asn.dev

Autonomous system

AS18881 TELEFONICA BRASIL S.A

Unclassified RIPE

IPv4 addresses 4.60M 535 prefixes
IPv6 prefixes 85 counted as prefixes, not addresses
Countries 1 mostly BR
Exchanges 1 recorded by PCH
Upstreams 1 1 downstream
Flagged prefixes 0 none

Summary

Vivo

Brazil · AI-generated

residential telecom isp brazil

TELEFONICA BRASIL S.A is held by Telefônica Brasil S.A, operating under the brand Vivo.

What it's used for

  • The address space carries residential broadband access, evidenced by reverse DNS entries such as 177.97.64.dynamic.adsl.gvt.net.br and 177.134.64.0.static.gvt.net.br.
  • The AS announces 4,581,376 IPv4 addresses across 526 prefixes and 91 IPv6 prefixes, while maintaining only 2 observed neighbours, a ratio indicative of a large-scale access network rather than a transit provider.

Notable

  • All sampled registrants are listed as TELEFÔNICA BRASIL S.A, which aligns perfectly with the AS handle and the operator's identity.
  • The operator was originally formed as part of Telebrás and underwent rebranding from Telecomunicações de São Paulo S.A. (TELESP) to Telefônica Brasil S.A. in October 2011.
  • The inventory consists of numerous /16 and /17 blocks, primarily in the 177.0.0.0/8 range, reflecting a finely subdivided corporate estate for site-by-site segmentation.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 1 exchange in 1 country, largest first.

ExchangeLocationTheir address
IX.br (PTT.br) CampinasCampinas, Brazil200.192.108.39

Transit providers

1 upstream, 1 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS10429TELEFONICA BRASIL S.A58,288

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-22, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 535 prefixes · 4.60M addresses IPv6 85 prefixes

CountryNamePrefixes
BRBrazil620

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
18881
Registry name
ASN18881
Registrant
TELEFÔNICA BRASIL S.A
Abuse contact
CSIRT TELEFONICA BR
Registered
2000-10-23
Last changed
2019-07-30
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1,026 with no ROA
ROAs
0 authorising AS18881
ASPA
no ASPA record
IRR
99.7% registered · 1,023 of 1,026 announcements 1 other origin
Route objects
39 naming AS18881

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,779 prefixes, as published 2026-10-23. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check