Organization
Circular Informationssysteme GmbH
CIRC-AS
Registered
Jul 25, 2000
26 years ago
IPv4 Prefixes
5
8,192 addresses
IPv6 Prefixes
1
65,536 × /48
BGP Neighbours
2
2 upstream/peer · 0 downstream
Registration
AS Number AS15518 AS Name CIRC-AS Organization Circular Informationssysteme GmbH Organization ID ORG-cIG1-RIPE Address Schulze-Delitzsch-Strasse 36, D-70565, Stuttgart, GERMANY Country Germany (DE) Registry RIPE NCC Allocated Jul 25, 2000 Record Created Aug 22, 2002 Last Updated Oct 24, 2025 Status
active
WHOIS Server whois.ripe.net AS Description CIRC-AS - Circular Informationssysteme GmbH, DE Remarks Schulze-Delitzsch-Str.36, 70565 Stuttgart, Germany, AS220 COLT Internet, AS5400 BT Abuse Email [email protected] Abuse Phone +49 711 78717 0 IPv4 Prefixes
5 prefixes · 8,192 addresses Routing data as of 2026-10-08 16:00 UTC
| Prefix | Range | Addresses |
|---|---|---|
| 212.86.160.0/20 | 212.86.160.0 – 212.86.175.255 | 4,096 |
| 212.86.180.0/22 | 212.86.180.0 – 212.86.183.255 | 1,024 |
| 212.86.188.0/22 | 212.86.188.0 – 212.86.191.255 | 1,024 |
| 213.153.64.0/22 | 213.153.64.0 – 213.153.67.255 | 1,024 |
| 213.153.72.0/22 | 213.153.72.0 – 213.153.75.255 | 1,024 |
IPv6 Prefixes
1 prefix · 65,536 × /48 Routing data as of 2026-10-08 16:00 UTC
| Prefix | Addresses |
|---|---|
| 2a00:1180:: | 296 |
BGP Neighbours
2 unique neighbours · 2 upstream/peer · 0 downstream. 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. Networks seen to the left of this AS in BGP paths, toward the route collectors — typically its transit providers (upstreams) and peers. Upstream & peer side (2)
Raw RDAP Response
{
"handle": "AS15518",
"startAutnum": 15518,
"endAutnum": 15518,
"name": "CIRC-AS",
"status": [
"active"
],
"entities": [
{
"handle": "CIR-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"CIRCULAR NETMASTER"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "circular Informationssysteme GmbH\nSchulze-Delitzsch-Strasse 36\nD-70565 Stuttgart\nGERMANY"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+49 711 78717 0"
],
[
"tel",
{
"type": "fax"
},
"text",
"+49 711 78717 29"
]
]
],
"roles": [
"administrative",
"technical"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/CIR-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "CIRCULAR-NET",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/CIRCULAR-NET"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "CIRCULAR-NOC",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/CIRCULAR-NOC"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "ORG-cIG1-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Circular Informationssysteme GmbH"
],
[
"kind",
{},
"text",
"org"
],
[
"adr",
{
"label": "Schulze-Delitzsch-Strasse 36\nD-70565\nStuttgart\nGERMANY"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+49 711 787170"
],
[
"tel",
{
"type": "fax"
},
"text",
"+49 711 7871729"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/ORG-cIG1-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "RIPE-NCC-END-MNT",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/RIPE-NCC-END-MNT"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "CG623-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"CIRCULAR GUARDIAN"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "circular Informationssysteme GmbH\nSchulze-Delitzsch-Strasse 36\nD-70565 Stuttgart\nGERMANY"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+49 711 78717 0"
],
[
"tel",
{
"type": "fax"
},
"text",
"+49 711 78717 29"
],
[
"email",
{
"type": "abuse"
},
"text",
"[email protected]"
]
]
],
"roles": [
"abuse"
],
"entities": [
{
"handle": "CIRCULAR-NET",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/CIRCULAR-NET"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "CIRCULAR-NOC",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
],
"roles": [
"registrant"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/CIRCULAR-NOC"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "HAB-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
],
"roles": [
"administrative",
"technical"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/HAB-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
},
{
"handle": "RB121-RIPE",
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
],
"roles": [
"administrative",
"technical"
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/entity/RB121-RIPE"
},
{
"value": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"href": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity"
}
],
"objectClassName": "entity"
}
],
"remarks": [
{
"description": [
"Schulze-Delitzsch-Str.36",
"70565 Stuttgart",
"Germany",
"AS220 COLT Internet",
"AS5400 BT"
]
}
],
"links": [
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "rdap-up",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-up/AS15518",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "rdap-up rdap-active",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-up/AS15518?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "rdap-down",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-down/AS15518",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "rdap-top",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-top/AS15518",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "rdap-top rdap-active",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-top/AS15518?status=active",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "rdap-bottom",
"href": "https://rdap.db.ripe.net/autnums/rirSearch1/rdap-bottom/AS15518",
"type": "application/rdap+json"
},
{
"value": "https://rdap.db.ripe.net/autnum/15518",
"rel": "self",
"href": "https://rdap.db.ripe.net/autnum/15518",
"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": "2002-08-22T16:07:20Z"
},
{
"eventAction": "last changed",
"eventDate": "2025-10-24T11:09:21Z"
}
],
"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/15518",
"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/15518",
"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": "$.entities[?(@.handle=='CIR-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
},
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='ORG-cIG1-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
},
{
"name": {
"description": "Personal e-mail information"
},
"reason": {
"description": "Personal data"
},
"prePath": "$.entities[?(@.handle=='CG623-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"method": "removal"
}
]
} Contact details of private individuals are redacted.