Autonomous system
AS16735 ALGAR TELECOM SA
Unclassified LACNIC
Summary
ALGAR TELECOM S/A
isp telecom transit
Three brand names live in the reverse zone, and two of them belong to companies that were renamed.
What it's used for
- A national carrier's network. One hundred and nineteen IPv4 prefixes and twenty sixth-version prefixes announced from Brazil, five hundred and thirty-eight thousand eight hundred and eighty addresses, through six hundred and fifty-nine observed BGP neighbours.
Notable
- Every netname is a bare registry record number, five or six digits, with no letters at all. Twelve blocks carry eleven different numbers, and two blocks in one parent range share theirs.
- Fourteen of eighteen queried addresses answered, spread across three domains: the current brand, a predecessor brand, and a shorter form of that predecessor with a three-letter locality inserted.
- Most names are the address with each part padded to three digits and joined by hyphens, then a word meaning fixed.
- One is a router: an interface name, a role, a hardware family, and a site code.
- One name has the reverse lookup zone for its address appended after a complete domain.
Interesting
- Numeric netnames come from a registry that identifies a block by its own record rather than by any label the holder chose. The result is a record where nothing but the registrant says who this is.
- Six hundred and fifty-nine neighbours on half a million addresses is a carrier that sells transit as much as access, and the predecessor brands still answering are the acquisitions that built it.
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
Recorded at 17 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.217.48 |
| IX.br (PTT.br) Fortaleza | Fortaleza, Brazil | 45.68.73.114 |
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.236.205 |
| IX.br (PTT.br) Porto Alegre | Porto Alegre, Brazil | 177.52.38.24 |
| IX.br (PTT.br) Brasília | Brasília, Brazil | 45.184.144.60 |
| IX.br (PTT.br) Curitiba | Curitiba, Brazil | 45.184.146.103 |
| IX.br (PTT.br) Recife | Recife, Brazil | 200.219.147.37 |
| IX.br (PTT.br) Salvador | Salvador, Brazil | 200.219.145.16 |
Transit providers
7 upstream, 516 downstream and 509 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 125 prefixes · 539K addresses IPv6 20 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 145 |
Registry
Allocation record
- Registry
- LACNIC
- Registered
- 2000-08-17
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 51 with no ROA
- ROAs
- 19 authorising AS16735
- ASPA
- no ASPA record
- IRR
- 94% registered · 48 of 51 announcements 1 other origin
- Route objects
- 33 naming AS16735
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: 431 networks and 1,775 prefixes, as published 2026-10-11. 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