137.159.0.0/16

Currently announced by AS20343 Pepperdine University, in the routed prefix 137.159.0.0/16.

Current ASN: AS20343; Pepperdine University
Routed prefix: 137.159.0.0/16; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 137.159.0.0/16

Routing data · Oct 24, 2026, 02:18 UTC

ASN historyEvery routed prefix covering 137.159.0.0/16

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
137.159.0.0/16	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing

More specific routes15 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
137.159.0.0/17	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.0.0/18	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.20.0/24	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.64.0/18	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.128.0/18	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.128.0/19	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.160.0/19	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.192.0/18	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.192.0/19	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.224.0/20	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.228.0/22	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.232.0/22	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.248.0/21	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.248.0/22	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing
137.159.252.0/22	AS20343	Pepperdine University	United States	Before monitoring	2026-10-24 02:18	Announcing

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: 137.159.0.0/16
Country: United States
Allocation date: 1989-12-12
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.