Autonomous system
AS13443 LINKEDIN
Unclassified ARIN
Summary
enterprise hosting business
The only address that answered reverse DNS answered with an acquired company's domain.
What it's used for
- A professional networking company's network. 4,608 addresses across thirteen IPv4 prefixes, sixty-nine IPv6 prefixes, and thirteen observed BGP neighbours.
Notable
- Five /24s are netname
LinkedInand two /23s are netnameLINKEDIN-17, registered asLinkedin. 45.42.64.0/22is netnameLYNDA-NTWK1, registered to the parent company.- Two /24s are netname
NTTA-128-242, registered to a transit provider with a second name,VIPAR. 216.52.16.0/24is netnameUG-210, registered to a different network company entirely.- Eighteen addresses were queried and one answered, as
45-42-66-254.fwd.lynda.com.
Interesting
- An online training company bought years ago still owns its block in the registry and its domain in DNS. Netnames and reverse zones are the last things anyone changes after an acquisition, because changing them breaks whatever was configured against them.
- Two of the announced blocks are registered to providers rather than to the company announcing them. That is leased or hosted space: the address holder is the vendor, the network origin is the tenant, and only the routing table connects the two.
- Sixty-nine IPv6 prefixes against thirteen IPv4 ones is a network built recently enough that the scarce resource shaped the smaller half.
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 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Seattle Internet Exchange | Seattle, United States | 2001:504:16::3483 |
Transit providers
12 upstream, 0 downstream and 22 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 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 11 prefixes · 4.10K addresses IPv6 69 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 80 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS13443- Registry name
- Registrant
- LinkedIn Corporation
- Abuse contact
- abuse@linkedin.com
- Registered
- 2014-01-27
- Last changed
- 2023-09-19
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 18% valid · 14 valid, 62 with no ROA
- ROAs
- 7 authorising AS13443
- ASPA
- no ASPA record
- IRR
- 96% registered · 73 of 76 announcements
- Route objects
- 109 naming AS13443
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 1,771 prefixes, as published 2026-10-15. 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