Autonomous system
AS5779 YAHOO-DNB - Yahoo Holdings Inc.
Unclassified ARIN
Summary
Yahoo
enterprise hosting edge legacy
YAHOO-DNB is a small Yahoo network. It is one of several autonomous systems the company runs to carry its own services; Yahoo's bulk traffic rides other, much larger ASNs.
What it's used for
- Serving Yahoo's own web properties and supporting infrastructure. Reverse DNS on the range resolves under
yahoo.com, with router names marking it as edge networking equipment.
Notable
- Content-provider infrastructure rather than a hosting company: you cannot buy space here, and the addresses front Yahoo's services rather than third-party customers.
- Deliberately small. Only three IPv4
/24s plus an IPv6/48are announced, around 768 addresses, which points to a single site or edge point of presence rather than a full data-center footprint.
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 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS10310 | Yahoo Holdings Inc. | 218 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-02, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 768 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS5779- Registry name
- YAHOO-DNB
- Registrant
- Yahoo Holdings Inc.
- Abuse contact
- rir-abuse@yahooinc.com
- Registered
- 1995-10-18
- Last changed
- 2019-05-01
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS5779
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 7 naming AS5779
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: 448 networks and 1,851 prefixes, as published 2026-11-03. 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