74.174.0.0/16

Currently announced by AS6389 AT&T Enterprises, LLC, in the routed prefix 74.174.0.0/16.

Current ASN: AS6389; AT&T Enterprises, LLC
Routed prefix: 74.174.0.0/16; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 74.174.0.0/15

Routing data · Oct 23, 2026, 20:21 UTC

ASN historyEvery routed prefix covering 74.174.0.0/16

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
74.174.0.0/16	AS6389	AT&T Enterprises, LLC	United States	Before monitoring	2026-10-23 20:21	Announcing

More specific routes17 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
74.174.32.0/24	AS36542	Gwinnett County Government	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.40.0/21	AS2386	AT&T Data Communications Services	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.48.0/24	AS2386	AT&T Data Communications Services	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.49.0/24	AS2386	AT&T Data Communications Services	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.50.0/24	AS2386	AT&T Data Communications Services	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.59.0/24	AS399974	Fulton County Government	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.194.0/24	AS29902	Complete Computers	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.195.0/24	AS29902	Complete Computers	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.196.0/24	AS29902	Complete Computers	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.197.0/24	AS29902	Complete Computers	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.198.0/24	AS29902	Complete Computers	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.199.0/24	AS29902	Complete Computers	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.200.0/24	AS29902	Complete Computers	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.204.0/22	AS33218	Belzoni Cable	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.206.0/23	AS33218	Belzoni Cable	United States	Before monitoring	2026-10-23 20:21	Announcing
74.174.130.0/24	AS2386	AT&T Data Communications Services	United States	Before monitoring	2026-10-23 12:18	Stopped
74.174.131.0/24	AS2386	AT&T Data Communications Services	United States	Before monitoring	2026-10-23 12:18	Stopped

Change logAll changes

The routes covering this address have had no origin changes since ASNBase started monitoring.

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RIR allocation record

Registry: ARIN
Allocated block: 74.174.0.0/15
Country: United States
Allocation date: 2006-10-30
Status: allocated

From the RIRs’ delegated statistics files. Shows where the addresses are registered, not where they are used.

How monitoring works

Every 2 hours ASNBase takes the bgp.tools global routing table (prefix → origin ASN) and compares it with the previous one. The detected time is the time of that comparison; the actual change can be up to about 2 hours earlier.
Only routes seen by more than 100 bgp.tools peers are listed as changes; routes with less visibility are only kept in the history.
A new announcement counts only if it is still in the next routing table, and a withdrawal only if the prefix is missing from two tables in a row, so short flaps are ignored.
ASNBase has been monitoring since 2026-10-19. “Before monitoring” under “First seen” means the route was already announced when monitoring started; the earlier date is unknown.
Prefixes first seen during the first day of monitoring do not count as new announcements: most of them were simply missing from the table at the moment monitoring started.
Countries and regions follow the ASN’s registration, not the actual location of the IP addresses.