157.240.0.0/17

Currently announced by AS32934 Meta, in the routed prefix 157.240.0.0/17.

Current ASN: AS32934; Meta
Routed prefix: 157.240.0.0/17; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 157.240.0.0/16

Routing data · Nov 8, 2026, 12:23 UTC

ASN historyEvery routed prefix covering 157.240.0.0/17

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
157.240.0.0/17	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing

More specific routes18 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
157.240.0.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.5.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.8.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.9.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.11.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.13.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.14.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.15.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.17.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.22.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.24.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.25.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.26.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.27.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.29.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.30.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.31.0/24	AS32934	Meta	United States	Before monitoring	2026-11-08 12:23	Announcing
157.240.12.0/24	AS32934	Meta	United States	Before monitoring	2026-11-04 08:21	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: 157.240.0.0/16
Country: United States
Allocation date: 2015-05-14
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.