Dashboard / ASN Lookup / AS28571

AS28571

UNIVERSIDADE DE SAO PAULO

LACNIC BR Announced

More ASNs in Brazil →

Organization

UNIVERSIDADE DE SAO PAULO

ASN28571

Registered

Dec 19, 2007

18 years ago

IPv4 Prefixes

154,624 addresses

IPv6 Prefixes

65,536 × /48

BGP Neighbours

9 upstream/peer · 0 downstream · 17 collector-only

Registration

AS Number AS28571 AS Name ASN28571 Handle 28571 Organization UNIVERSIDADE DE SAO PAULO Organization ID 63025530000104 Address BR Country Brazil (BR) Registry LACNIC Type DIRECT ALLOCATION Allocated Dec 19, 2007 Record Created Dec 19, 2007 Last Updated Nov 12, 2015 WHOIS Server whois.registro.br AS Description AS28571 - UNIVERSIDADE DE SAO PAULO, BR Abuse Email [email protected]

IPv4 Prefixes

41 prefixes · 154,624 addresses · 16 top-level Routing data as of 2026-10-06 08:00 UTC

143.0.0.0/8 · 10 prefixes · 65,536 addresses

Prefix	Range	Addresses
143.107.0.0/16	143.107.0.0 – 143.107.255.255	65,536
143.107.3.0/24	143.107.3.0 – 143.107.3.255	256
143.107.8.0/24	143.107.8.0 – 143.107.8.255	256
143.107.14.0/24	143.107.14.0 – 143.107.14.255	256
143.107.44.0/23	143.107.44.0 – 143.107.45.255	512
143.107.154.0/24	143.107.154.0 – 143.107.154.255	256
143.107.178.0/23	143.107.178.0 – 143.107.179.255	512
143.107.248.0/24	143.107.248.0 – 143.107.248.255	256
143.107.253.0/24	143.107.253.0 – 143.107.253.255	256
143.107.254.0/24	143.107.254.0 – 143.107.254.255	256

177.0.0.0/8 · 2 prefixes · 49,152 addresses

Prefix	Range	Addresses
177.90.64.0/18	177.90.64.0 – 177.90.127.255	16,384
177.90.128.0/17	177.90.128.0 – 177.90.255.255	32,768

200.0.0.0/8 · 29 prefixes · 39,936 addresses

Prefix	Range	Addresses
200.9.95.0/24	200.9.95.0 – 200.9.95.255	256
200.17.16.0/20	200.17.16.0 – 200.17.31.255	4,096
200.18.53.0/24	200.18.53.0 – 200.18.53.255	256
200.18.106.0/23	200.18.106.0 – 200.18.107.255	512
200.18.108.0/23	200.18.108.0 – 200.18.109.255	512
200.136.0.0/20	200.136.0.0 – 200.136.15.255	4,096
200.136.49.0/24	200.136.49.0 – 200.136.49.255	256
200.136.52.0/23	200.136.52.0 – 200.136.53.255	512
200.136.54.0/24	200.136.54.0 – 200.136.54.255	256
200.144.48.0/20	200.144.48.0 – 200.144.63.255	4,096
200.144.60.0/24	200.144.60.0 – 200.144.60.255	256
200.144.72.0/23	200.144.72.0 – 200.144.73.255	512
200.144.160.0/19	200.144.160.0 – 200.144.191.255	8,192
200.144.180.0/23	200.144.180.0 – 200.144.181.255	512
200.144.182.0/23	200.144.182.0 – 200.144.183.255	512
200.144.184.0/21	200.144.184.0 – 200.144.191.255	2,048
200.144.192.0/18	200.144.192.0 – 200.144.255.255	16,384
200.144.212.0/24	200.144.212.0 – 200.144.212.255	256
200.144.234.0/23	200.144.234.0 – 200.144.235.255	512
200.144.236.0/24	200.144.236.0 – 200.144.236.255	256
200.144.237.0/24	200.144.237.0 – 200.144.237.255	256
200.144.238.0/24	200.144.238.0 – 200.144.238.255	256
200.144.239.0/24	200.144.239.0 – 200.144.239.255	256
200.144.244.0/22	200.144.244.0 – 200.144.247.255	1,024
200.144.248.0/24	200.144.248.0 – 200.144.248.255	256
200.144.249.0/24	200.144.249.0 – 200.144.249.255	256
200.144.250.0/23	200.144.250.0 – 200.144.251.255	512
200.144.252.0/23	200.144.252.0 – 200.144.253.255	512
200.144.254.0/23	200.144.254.0 – 200.144.255.255	512

IPv6 Prefixes

9 prefixes · 65,536 × /48 · 1 top-level Routing data as of 2026-10-06 08:00 UTC

Prefix	Addresses
2001:12d0::/32	2⁹⁶
2001:12d0::/48	2⁸⁰
2001:12d0:840::/48	2⁸⁰
2001:12d0:880::/48	2⁸⁰
2001:12d0:8c0::/48	2⁸⁰
2001:12d0:8068::/48	2⁸⁰
2001:12d0:8070::/48	2⁸⁰
2001:12d0:c000::/48	2⁸⁰
2001:12d0:c080::/48	2⁸⁰

BGP Neighbours

26 unique neighbours · 9 upstream/peer · 0 downstream · 17 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 (9)

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

AS	Name	AS paths	IPv4 sightings	IPv6 sightings
AS52468	AS52468 - UFINET PANAMA S.A.	481	8,890	2,366
AS61610	AS61610 - ELEA DATA CENTERS	256	4,289	48
AS1251	AS1251 - FUNDACAO DE AMPARO A PESQUISA DO ESTADO SAO PAULO	237	575	294
AS6939	HURRICANE - Hurricane Electric LLC	120	496	143
AS35280	F5 F5 Networks SARL	7	16	9
AS137409	GSLNETWORKS-AS-AP - GSL Networks Pty LTD	6	0	7
AS6057	AS6057 - Administracion Nacional de Telecomunicaciones	2	32	4
AS39120	CONVERGENZE-AS Convergenze S.p.A.	1	0	1
AS61626	AS61626 - UNIVERSIDADE ESTADUAL DE PONTA GROSSA	1	0	1

Collector-only (17)

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.

AS	Name	AS paths	IPv4 sightings	IPv6 sightings
AS14840	AS14840 - BR.Digital Telecom	1	64	8
AS22548	AS22548 - Nucleo de Inf. e Coord. do Ponto BR - NIC.BR	1	16	2
AS24482	SGGS-AS-AP - SG.GS	1	32	4
AS28624	AS28624 - PROVEDORA CMA INTERNET LTDA	1	16	2
AS28634	AS28634 - Life Tecnologia Ltda.	1	32	0
AS36236	NETACTUATE - NetActuate, Inc	1	16	2
AS51185	MAINSTREAMING-AS MainStreaming SpA	1	32	2
AS52873	AS52873 - Softdados Telecomunicacoes	1	3	2
AS60503	FNXTEC FNX Tecnologia LTDA	1	0	2
AS61573	AS61573 - IP TELECOM	1	13	2
AS198150	SIACOM-AS SIACOM JSC	1	16	0
AS199524	GCORE G-Core Labs S.A.	1	16	1
AS262427	AS262427 - Invista Net Provedor de Acesso Ltda	1	16	0
AS263152	AS263152 - MIGO TELECOM	1	16	2
AS263237	AS263237 - PowerHost Telecom SPA	1	0	2
AS264479	AS264479 - Turbozone Internet	1	16	0
AS271253	AS271253 - LINK BRASIL TELECOMUNICACOES LTDA	1	32	0

Raw RDAP Response

{
  "objectClassName": "autnum",
  "handle": "28571",
  "startAutnum": 28571,
  "endAutnum": 28571,
  "name": "ASN28571",
  "type": "DIRECT ALLOCATION",
  "country": "BR",
  "links": [
    {
      "value": "https://rdap.registro.br/autnum/28571",
      "rel": "self",
      "href": "https://rdap.registro.br/autnum/28571",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.registro.br/autnum/28571",
      "rel": "related",
      "href": "https://rdap.registro.br/ip/200.17.16.0/20",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.registro.br/autnum/28571",
      "rel": "related",
      "href": "https://rdap.registro.br/ip/200.144.160.0/19",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.registro.br/autnum/28571",
      "rel": "related",
      "href": "https://rdap.registro.br/ip/2001:12d0::/32",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.registro.br/autnum/28571",
      "rel": "related",
      "href": "https://rdap.registro.br/ip/200.144.192.0/18",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.registro.br/autnum/28571",
      "rel": "related",
      "href": "https://rdap.registro.br/ip/143.107.0.0/16",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.registro.br/autnum/28571",
      "rel": "related",
      "href": "https://rdap.registro.br/ip/200.9.95.0/24",
      "type": "application/rdap+json"
    },
    {
      "value": "https://rdap.registro.br/autnum/28571",
      "rel": "related",
      "href": "https://rdap.registro.br/ip/177.90.0.0/16",
      "type": "application/rdap+json"
    }
  ],
  "entities": [
    {
      "objectClassName": "entity",
      "handle": "63025530000104",
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "kind",
            {},
            "text",
            "org"
          ],
          [
            "fn",
            {},
            "text",
            "UNIVERSIDADE DE SAO PAULO"
          ],
          [
            "adr",
            {},
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              "BR"
            ]
          ]
        ]
      ],
      "roles": [
        "registrant"
      ],
      "publicIds": [
        {
          "type": "cnpj",
          "identifier": "63.025.530/0001-04"
        }
      ],
      "entities": [
        {
          "objectClassName": "entity",
          "handle": "COEUS",
          "vcardArray": [
            "vcard",
            [
              [
                "version",
                {},
                "text",
                "4.0"
              ],
              [
                "fn",
                {},
                "text",
                "REDACTED"
              ],
              [
                "kind",
                {},
                "text",
                "individual"
              ]
            ]
          ],
          "roles": [
            "administrative"
          ],
          "events": [
            {
              "eventAction": "registration",
              "eventDate": "2015-11-12T16:32:49Z"
            },
            {
              "eventAction": "last changed",
              "eventDate": "2017-07-04T01:47:07Z"
            }
          ]
        }
      ],
      "events": [
        {
          "eventAction": "registration",
          "eventDate": "1998-01-16T12:00:00Z"
        },
        {
          "eventAction": "last changed",
          "eventDate": "2020-08-12T13:33:01Z"
        }
      ],
      "links": [
        {
          "value": "https://rdap.registro.br/entity/63025530000104",
          "rel": "self",
          "href": "https://rdap.registro.br/entity/63025530000104",
          "type": "application/rdap+json"
        }
      ],
      "legalRepresentative": "REDACTED"
    },
    {
      "objectClassName": "entity",
      "handle": "CAIUS",
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "fn",
            {},
            "text",
            "REDACTED"
          ],
          [
            "kind",
            {},
            "text",
            "individual"
          ]
        ]
      ],
      "roles": [
        "administrative"
      ],
      "events": [
        {
          "eventAction": "registration",
          "eventDate": "2015-11-12T16:00:19Z"
        },
        {
          "eventAction": "last changed",
          "eventDate": "2019-12-09T13:28:04Z"
        }
      ]
    },
    {
      "objectClassName": "entity",
      "handle": "CUGST",
      "vcardArray": [
        "vcard",
        [
          [
            "version",
            {},
            "text",
            "4.0"
          ],
          [
            "kind",
            {},
            "text",
            "individual"
          ],
          [
            "fn",
            {},
            "text",
            "CSIRT USP / Grupo de Segurança em TI"
          ],
          [
            "email",
            {},
            "text",
            "[email protected]"
          ],
          [
            "lang",
            {},
            "language-tag",
            "pt"
          ],
          [
            "adr",
            {},
            "text",
            [
              "",
              "",
              "",
              "",
              "",
              "",
              "BR"
            ]
          ]
        ]
      ],
      "roles": [
        "abuse"
      ],
      "events": [
        {
          "eventAction": "registration",
          "eventDate": "2011-02-08T20:08:12Z"
        },
        {
          "eventAction": "last changed",
          "eventDate": "2026-02-05T19:27:53Z"
        }
      ]
    }
  ],
  "events": [
    {
      "eventAction": "registration",
      "eventDate": "2007-12-19T19:21:48Z"
    },
    {
      "eventAction": "last changed",
      "eventDate": "2015-11-12T16:19:26Z"
    }
  ],
  "notices": [
    {
      "title": "Use and Privacy Policy",
      "description": [
        "Copyright (c) Nic.br - Use of this data is governed by the Use and Privacy Policy. Distribution, commercialization, reproduction, and use for advertising or similar purposes are expressly prohibited.",
        "2026-10-06T15:53:50-03:00 - 2600:1900:0:4a04::501"
      ],
      "links": [
        {
          "value": "https://rdap.registro.br/autnum/28571",
          "rel": "alternate",
          "href": "https://registro.br/upp",
          "type": "text/html"
        }
      ]
    }
  ],
  "rdapConformance": [
    "rdap_level_0",
    "nicbr_level_0"
  ],
  "port43": "whois.registro.br"
}

Contact details of private individuals are redacted.