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AS5408

National Infrastructures for Research and Technology S.A.

RIPE NCC GR active Announced
More ASNs in Greece →
Organization
National Infrastructures for Research and Technology S.A.
GR-NET
Registered
Sep 06, 1995
31 years ago
IPv4 Prefixes
29
245,248 addresses
IPv6 Prefixes
1
524,288 × /48
BGP Neighbours
38
5 upstream/peer · 30 downstream · 33 collector-only

Registration

AS Number AS5408 AS Name GR-NET Organization National Infrastructures for Research and Technology S.A. Organization ID ORG-GRaT1-RIPE Address 7 Kifisias Av., 11523, Athens, GREECE Country Greece (GR) Registry RIPE NCC Allocated Sep 06, 1995 Last Updated Dec 31, 2021 Status
active
WHOIS Server whois.ripe.net AS Description GR-NET - National Infrastructures for Research and Technology S.A., GR Remarks http://www.grnet.gr, General Info, ==============, GRNET donwstream customers are Greek Universities, Academic, and Research Institutes, GRNET has GEANT as its upstream; it also connects to GRIX, Internet Exchange, RPKI in GRNET, GRNET ***drops*** ALL RPKI invalid prefixes received from Upstream, an… Abuse Email [email protected] Abuse Phone +30 210 7474274

IPv4 Prefixes

29 prefixes · 245,248 addresses · 23 top-level Routing data as of 2026-10-07 00:00 UTC

PrefixRangeAddresses
37.32.128.0/1737.32.128.0 – 37.32.255.25532,768
44.31.164.0/2444.31.164.0 – 44.31.164.255256
62.217.64.0/1862.217.64.0 – 62.217.127.25516,384
62.217.85.0/2462.217.85.0 – 62.217.85.255256
62.217.126.0/2462.217.126.0 – 62.217.126.255256
83.212.0.0/1683.212.0.0 – 83.212.255.25565,536
83.212.168.0/2383.212.168.0 – 83.212.169.255512
91.227.108.0/2491.227.108.0 – 91.227.108.255256
109.107.139.0/24109.107.139.0 – 109.107.139.255256
143.233.68.0/24143.233.68.0 – 143.233.68.255256
143.233.182.0/23143.233.182.0 – 143.233.183.255512
143.233.184.0/22143.233.184.0 – 143.233.187.2551,024
143.233.188.0/23143.233.188.0 – 143.233.189.255512
143.233.204.0/24143.233.204.0 – 143.233.204.255256
150.140.128.0/17150.140.128.0 – 150.140.255.25532,768
185.5.76.0/22185.5.76.0 – 185.5.79.2551,024
185.81.196.0/22185.81.196.0 – 185.81.199.2551,024
193.105.109.0/24193.105.109.0 – 193.105.109.255256
193.218.36.0/24193.218.36.0 – 193.218.36.255256
193.218.124.0/23193.218.124.0 – 193.218.125.255512
194.42.50.0/23194.42.50.0 – 194.42.51.255512
194.42.52.0/23194.42.52.0 – 194.42.53.255512
194.42.54.0/24194.42.54.0 – 194.42.54.255256
194.177.192.0/19194.177.192.0 – 194.177.223.2558,192
194.177.208.0/22194.177.208.0 – 194.177.211.2551,024
195.130.64.0/18195.130.64.0 – 195.130.127.25516,384
195.251.0.0/16195.251.0.0 – 195.251.255.25565,536
195.251.2.0/24195.251.2.0 – 195.251.2.255256
195.251.24.0/22195.251.24.0 – 195.251.27.2551,024

IPv6 Prefixes

1 prefix · 524,288 × /48 Routing data as of 2026-10-07 00:00 UTC

PrefixAddresses
2001:648::/29299

BGP Neighbours

38 unique neighbours · 5 upstream/peer · 30 downstream · 33 collector-only. A neighbour can be seen on more than one side. Rows are ordered by AS paths: the number of BGP paths seen by RIPE RIS that contain the adjacency. Sightings count each IPv4/IPv6 route with the adjacency once per RIS peer that sees it (routes × peers), so they show how widely it is seen, not how many distinct routes it carries.

Upstream & peer side (5)

Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers.

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS21320GEANT_IAS_VRF GEANT Vereniging10,54135,2168,549
AS20965GEANT GEANT Vereniging2881,047197
AS13335CLOUDFLARENET - Cloudflare, Inc.2741,4670
AS3491PCCWG-APAC-HK - PCCW Global (HK) Ltd.14765554
AS8280SYNAPSECOM-AS SYNAPSECOM S.A. Provider of Telecommunications and Internet Services3511129

Downstream side (30)

Networks seen to the right of this AS in BGP paths — networks whose routes it carries, typically its customers (downstreams).

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS8522FORTH-AS Foundation of Research and Technology Hellas7031,125458
AS47065PEERING-RESEARCH-TESTBED-USC-UFMG-AS47065 - USC / UFMG PEERING Research Testbed571251,031
AS50148ERT Elliniki Radiofonia Tileorasi (ERT) SA4866400
AS31563HNMS-AS Hellenic National Meteorological Service3871,031684
AS8248GR-EDUNET Computer Technology Institute and Press "Diophantus"3752,1141,030
AS9069UNIWA3751,035342
AS8643ATHENAnet NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS3731,380342
AS8762TEI-OF-CRETE-AS Hellenic Mediterranean University3712,415342
AS8581UOI University Of Ioannina3702,415342
AS12402UOPIRAEUS University of Piraeus3701,380342
AS202640snfcc KENTRO POLITISMOU IDRYMA STAVROS NIARCHOS MONOPROSOPI A.E.370345345
AS3323NTUA National Technical University of Athens369345342
AS15690NOANET NATIONAL OBSERVATORY OF ATHENS3691,380342
AS47616CERTH Center for Research and Technology Hellas (CERTH)369345342
AS2546ARIADNE-T National Center of Scientific Research DEMOKRITOS368345342
AS5470ASAUTHNET Aristotle University of Thessaloniki368690342
AS6867UCnet University of Crete368690342
AS8253DUTHNET-AS Democritus University of Thrace3681,035342
AS8278TUC-AS Technical University of Crete368345342
AS12364UOM University of Macedonia, Economic and Social Sciences368690342
AS8618Ionion University2791,3800
AS8617University of the Aegean2781,3800
AS8991HCMR-NET Hellenic Centre for Marine Research2761,3750
AS8611Athens University of Economics and Business2671,0340
AS6744RACTI-NET Computer Technology Institute and Press "Diophantus"2663450
AS15948ICE/HT fundamental and technological research2661,0350
AS20813HOU-AS Hellenic Open University2666900
AS5489TEI-THES International Hellenic University2641,0350
AS203348EETT-AS Hellenic Telecommunications and Post Commision249286203
AS15536CEDEFOP-AS European Centre for the Development of Vocational Training (CEDEFOP)2102810

Collector-only (33)

Networks seen to the left of this AS only when they peer directly with a RIPE RIS route collector, so the adjacency may be an artefact of that peering; many of them also appear on the downstream side.

ASNameAS pathsIPv4 sightingsIPv6 sightings
AS197580AS-CONNECTICORE Connecticore Telecommunications Information Technology S.A3611229
AS56457FASTPATH FASTPATH IKE351120
AS51185MAINSTREAMING-AS MainStreaming SpA3210326
AS8522FORTH-AS Foundation of Research and Technology Hellas81110
AS47065PEERING-RESEARCH-TESTBED-USC-UFMG-AS47065 - USC / UFMG PEERING Research Testbed226
AS50148ERT Elliniki Radiofonia Tileorasi (ERT) SA220
AS2546ARIADNE-T National Center of Scientific Research DEMOKRITOS111
AS3323NTUA National Technical University of Athens111
AS5470ASAUTHNET Aristotle University of Thessaloniki121
AS5489TEI-THES International Hellenic University130
AS6744RACTI-NET Computer Technology Institute and Press "Diophantus"110
AS6867UCnet University of Crete121
AS8248GR-EDUNET Computer Technology Institute and Press "Diophantus"163
AS8253DUTHNET-AS Democritus University of Thrace131
AS8278TUC-AS Technical University of Crete111
AS8581UOI University Of Ioannina171
AS8611Athens University of Economics and Business130
AS8617University of the Aegean140
AS8618Ionion University140
AS8643ATHENAnet NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS141
AS8762TEI-OF-CRETE-AS Hellenic Mediterranean University171
AS8991HCMR-NET Hellenic Centre for Marine Research140
AS9069UNIWA131
AS12364UOM University of Macedonia, Economic and Social Sciences121
AS12402UOPIRAEUS University of Piraeus141
AS15536CEDEFOP-AS European Centre for the Development of Vocational Training (CEDEFOP)110
AS15690NOANET NATIONAL OBSERVATORY OF ATHENS141
AS15948ICE/HT fundamental and technological research130
AS20813HOU-AS Hellenic Open University120
AS31563HNMS-AS Hellenic National Meteorological Service132
AS47616CERTH Center for Research and Technology Hellas (CERTH)111
AS202640snfcc KENTRO POLITISMOU IDRYMA STAVROS NIARCHOS MONOPROSOPI A.E.111
AS203348EETT-AS Hellenic Telecommunications and Post Commision111

Raw RDAP Response

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  ],
  "remarks": [
    {
      "description": [
        "http://www.grnet.gr",
        "",
        "General Info",
        "==============",
        "GRNET donwstream customers are Greek Universities, Academic",
        "and Research Institutes",
        "GRNET has GEANT as its upstream; it also connects to GRIX",
        "Internet Exchange",
        "RPKI in GRNET",
        "GRNET ***drops*** ALL RPKI invalid prefixes received from Upstream",
        "and Greek Internet Exchange (GR-IX)",
        "PA Space Aggregation",
        "=============",
        "GRNET aggregates its PA space before announcing it to its",
        "upstream(s) and exchanges. Should a customer with PA space",
        "wishes not to have its prefixes aggregated, a special community",
        "should be used to tag this route (see below).",
        "Prefixes from GRNET allocation that announced from public ASs",
        "are announced deaggregated.\\",
        "Prefix lengths longer than /24 for IPv4 and /48 for IPv6 are NOT",
        "announced to Upstream or GRIX",
        "Primary/Backup control",
        "========================",
        "GRNET respects the MED received by its customers; thus, the",
        "customers can indicate their primary/backup line and control",
        "incoming traffic by setting MED appropriatelly. Also, the",
        "customers may use the community 5408:110 to indicate their",
        "backup connection (lower local pref), but this method is",
        "recommended only for customers multihomed to another Greek ISP",
        "that use their connection with GRNET as backup.",
        "Hot Potato routing",
        "By setting the same attributes (Local Preference and MED) on",
        "advertising prefixes, a customer with more than one connections",
        "with GRNET has the ability to use all active paths.",
        "By this way, \"hot potato\" routing is achieved. Traffic will exit",
        "GRNETs network choosing the closest to destination border router.",
        "Anycast",
        "GRNET does not follow any explicit policy for anycast services.",
        "Normal routing (and, thus, preference) applies to all anycast",
        "routes",
        "BGP Communities used in GRNET:",
        "================================",
        "Informational Communities:",
        "+---------------------------------------------------------------+",
        "| These communities tag the source of the routes. They can ONLY |",
        "| be appended by GRNET. Routes with this tag received by any |",
        "| peer will be rejected! |",
        "5408:1001 Routes received from GEANT",
        "5408:1002 Routes received from GRIX",
        "5408:1003 Routes from GRNET (Customers & BackBone)",
        "5408:1004 Routes from GEANT NREN",
        "5408:1005 Routes from GEANT IAS",
        "5408:1006 Routes from GEANT CLS",
        "Special Communities for route manipulation:",
        "5408:2000 Do not aggregate",
        "5408:2005 Prepend AS5408 x5",
        "5408:4001 Do not announce to GRIX",
        "5408:4005 Do not announce to GEANT",
        "5408:4006 Do not announce to GEANT NREN VRF",
        "5408:4007 Do not announce to GEANT Tier-1",
        "Routing Manipulation (for GRNET customers only):",
        "| This set of tools allow GRNET clients to manipulate their |",
        "| routing: |",
        "LOCAL PREFERENCES IN GRNET:",
        "=============================",
        "LocalPref 200: - GRNET Customers",
        "- Special Customers (KROOT, SYZEYXIS, ...)",
        "- Locally Generated GRNET Aggregates",
        "LocalPref 190: - GRNET Customers, backup connection",
        "LocalPref 180: - GEANT NREN VRF",
        "LocalPref 170: - GRIX routes (MED=0 Primary, MED=20 Secondary)",
        "LocalPref 160: - GEANT CLS VRF",
        "LocalPref 150: - GRNET as backup in dual homed customers",
        "LocalPref 140: - GEANT IAS VRF",
        "=======================================================================",
        "iBGP (AS5408)",
        "----------------------------------------------------------------------",
        "PEER DESCRIPTION:",
        "Full-mesh iBGP peerings.",
        "Import Policy: Accept ANY",
        "Export Policy: Advertize (a) all routes (FIRT) or (b) GRNET & GRIX",
        "routes only, depending on router capabilities.",
        "======================================================================",
        "GEANT (AS20965)",
        "GEANT is the Internet Upstream for GRNET",
        "Import Policy: Accept all routes (apart from martians),",
        "set MED appropratelly on primary & backup peering.",
        "Export Policy: Announce all GRNET routes (tagged with 5408:1003)",
        "that are not tagged with 5408:4005 (don't-announce-to-geant).",
        "Aggregate PA space (except from the routes tagged with",
        "5408:2000 (do not aggregate) community.",
        "GRIX Peers",
        "These are the GRIX Peers of GRNET",
        "Import Policy: Reject routes tagged with special communities",
        "Accept all other routes that",
        "(a) have the appropriate AS path and",
        "(b) originate from the peer (or behind it)",
        "For these, and according to the received communities:",
        "(i) Set the appropriate local preference",
        "that are not tagged with 5408:4001 (don't-announce-to-grix).",
        "GRIX RS",
        "GRIX ROUTER @ GRIX",
        "K-ROOT mirror @ GRIX",
        "K-ROOT @ GRIX. Accept K-Root routes, announce within GRNET *only*",
        "Announce default route.",
        "GRNET Clients",
        "These are the normal GRNET clients (Universities, Research orgs, etc)",
        "(b) originate from the client (or behind it)",
        "Prefixes with no corresponding exact matching route on the",
        "RIPE whois database are only accepted if tagged with NO_EXPORT",
        "Local Preference (on backup links) can be lowered by",
        "using the appropriate community (5408:110), but MED is",
        "recommended for this purpose.",
        "Export Policy:",
        "(a) either all routes (FIRT)",
        "(b) or a partial routing table, consiting",
        "GRNET (5408:1003) and GRIX (5408:1002) routes",
        "(c) or a partial routing table, consiting",
        "GRNET (5408:1003) and GRIX (5408:1002) routes plus default route 0/0.",
        "(d) or default route 0/0.",
        "EU ACADEMIC INTERNET (GRNET + OTHER EU NRENS)",
        "PEER DESCRIPTION: announce GRNET and GEANT NREN (community 20965:155), route within GRNET *only*.",
        "GRNET SERVICES",
        "do not announce anything, accept AS65500",
        "GRNET ECI-ECN",
        "do not announce anything, accept AS65502",
        "SYZEYXIS",
        "announce only GRNET routes, route within GRNET *only*.",
        "AKAMAI",
        "AKAMAI. Accept no routes. Announce GRNET customers."
      ]
    }
  ],
  "links": [
    {
      "value": "https://rdap.db.ripe.net/autnum/5408",
      "rel": "rdap-up",
      "href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-up/AS5408",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.db.ripe.net/autnum/5408",
      "rel": "rdap-up rdap-active",
      "href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-up/AS5408?status=active",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.db.ripe.net/autnum/5408",
      "rel": "rdap-down",
      "href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-down/AS5408",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.db.ripe.net/autnum/5408",
      "rel": "rdap-top",
      "href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-top/AS5408",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.db.ripe.net/autnum/5408",
      "rel": "rdap-top rdap-active",
      "href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-top/AS5408?status=active",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.db.ripe.net/autnum/5408",
      "rel": "rdap-bottom",
      "href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-bottom/AS5408",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.db.ripe.net/autnum/5408",
      "rel": "self",
      "href": "https://rdap.db.ripe.net/autnum/5408",
      "type": "application/rdap+json"
    },
    {
      "value": "http://www.ripe.net/data-tools/support/documentation/terms",
      "rel": "copyright",
      "href": "http://www.ripe.net/data-tools/support/documentation/terms"
    }
  ],
  "events": [
    {
      "eventAction": "registration",
      "eventDate": "1970-01-01T00:00:00Z"
    },
    {
      "eventAction": "last changed",
      "eventDate": "2021-12-31T11:31:18Z"
    }
  ],
  "rdapConformance": [
    "nro_rdap_profile_asn_flat_0",
    "rirSearch1",
    "autnums",
    "cidr0",
    "rdap_level_0",
    "nro_rdap_profile_0",
    "redacted"
  ],
  "notices": [
    {
      "title": "Filtered",
      "description": [
        "This output has been filtered."
      ]
    },
    {
      "title": "Whois Inaccuracy Reporting",
      "description": [
        "If you see inaccuracies in the results, please visit:"
      ],
      "links": [
        {
          "value": "https://rdap.db.ripe.net/autnum/5408",
          "rel": "inaccuracy-report",
          "href": "https://www.ripe.net/contact-form?topic=ripe_dbm&show_form=true",
          "type": "text/html"
        }
      ]
    },
    {
      "title": "Source",
      "description": [
        "Objects returned came from source",
        "RIPE"
      ]
    },
    {
      "title": "Terms and Conditions",
      "description": [
        "This is the RIPE Database query service. The objects are in RDAP format."
      ],
      "links": [
        {
          "value": "https://rdap.db.ripe.net/autnum/5408",
          "rel": "terms-of-service",
          "href": "http://www.ripe.net/db/support/db-terms-conditions.pdf",
          "type": "application/pdf"
        }
      ]
    }
  ],
  "port43": "whois.ripe.net",
  "objectClassName": "autnum",
  "redacted": [
    {
      "name": {
        "description": "Personal e-mail information"
      },
      "reason": {
        "description": "Personal data"
      },
      "prePath": "$.entities[?(@.handle=='GN1931-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "method": "removal"
    },
    {
      "name": {
        "description": "Personal e-mail information"
      },
      "reason": {
        "description": "Personal data"
      },
      "prePath": "$.entities[?(@.handle=='ORG-GRaT1-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "method": "removal"
    },
    {
      "name": {
        "description": "Personal e-mail information"
      },
      "reason": {
        "description": "Personal data"
      },
      "prePath": "$.entities[?(@.handle=='GN1931-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
      "method": "removal"
    }
  ]
}

Contact details of private individuals are redacted.