Autonomous system
AS10429 TELEFONICA BRASIL S.A
Residential APNIC
Summary
Telefonica Brasil (Vivo)
residential isp broadband eyeball
The Autonomous System of Telefônica Brasil S.A., the Brazilian arm of Telefónica trading as Vivo — the country's largest telecom operator, formed from the old Telesp fixed-line incumbent in São Paulo.
What it's used for
- Fixed broadband access for Brazilian subscribers: fiber and legacy DSL lines into homes and businesses, plus the corporate connectivity Telefônica sells under its data-services brand.
Notable
- Eyeball access network at incumbent scale. RIS sees 91 IPv4 prefixes carrying roughly 1,664,512 addresses, alongside 69 IPv6 prefixes — that is consumer-broadband volume, not enterprise or hosting volume.
- Reverse DNS settles the role. Sampled addresses across the big
/15s resolve to…customer.tdatabrasil.net.br, and elsewhere to…user.vivozap.com.brand…dsl.telesp.net.br. Sequential, dashed-IP PTRs generated across entire blocks are exactly how an access provider labels subscriber pools; the three domains are the fossil record of the same company under three names (Telesp, Telefônica Data, Vivo). - The 344 observed BGP neighbours are not a contradiction. A national incumbent peers widely because it has an enormous audience others want to reach — the neighbour count reflects the value of the eyeballs, not a wholesale transit business. What settles the kind is that the addresses themselves are full of end-user PTRs.
Interesting
- Note the split personality of the naming:
dsl.telesp.net.bris the copper-era incumbent,vivozap.com.brthe mobile-first consumer brand. A single AS can carry decades of merger history in its reverse DNS.
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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 241 downstream and 360 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS12956 | TELEFONICA GLOBAL SOLUTIONS SL | 7,097 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 81 prefixes · 1.64M addresses IPv6 46 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 127 |
Registry
Allocation record
- Registry
- APNIC
- Handle
10429- Registry name
- ASN10429
- Registrant
- TELEFÔNICA BRASIL S.A
- Abuse contact
- CSIRT TELEFONICA BR
- Registered
- 1999-11-16
- Last changed
- 2019-07-30
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 151 with no ROA
- ROAs
- 0 authorising AS10429
- ASPA
- no ASPA record
- IRR
- 48% registered · 72 of 151 announcements 1 other origin
- Route objects
- 30 naming AS10429
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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