Autonomous system
AS16515 ALTAVISTA
Unclassified ARIN
Summary
AltaVista
hosting media business
Three companies across three fields, and every address answers to the word for not knowing.
What it's used for
- A search company's network. One IPv4 prefix announced from the United States, no IPv6, two hundred and fifty-six addresses, through one observed BGP neighbour.
Notable
- The AS handle is a search engine brand that stopped operating long ago. The holder field is the company that ended up owning it. The netname is a third company again, one that was bought by the second.
- That netname is the third brand, three letters for a block, and a numeral, so it also implies five earlier blocks under the same scheme.
- All three queried addresses answered, and all three gave the same name: the word for something unidentified, on the holder's domain. No address here has a name of its own.
- The block is the smallest routable size, behind one observed neighbour.
Interesting
- A wildcard reverse name saying the address is unknown answers a question the operator would rather not answer precisely. It confirms the domain, refuses the detail, and keeps the lookup from failing outright.
- Three brands in one record is a fossil record of acquisitions read in order: the engine, the company that bought the infrastructure behind it, and the company that bought them both. Nothing in the registry says they are related; the dates and the addresses do.
- One block and one upstream is what remains of a name that once carried a large share of the web's searches.
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, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS10310 | Yahoo Holdings Inc. | 60 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS16515- Registry name
- ALTAVISTA
- Registrant
- Yahoo Holdings Inc.
- Abuse contact
- rir-abuse@yahooinc.com
- Registered
- 2000-05-05
- Last changed
- 2019-03-22
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS16515
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 3 naming AS16515
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 1,781 prefixes, as published 2026-10-16. 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