173.240.224.0/20

Currently announced by AS12268 Elizabethtown College, in the routed prefix 173.240.224.0/20.

Current ASN: AS12268; Elizabethtown College
Routed prefix: 173.240.224.0/20; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 173.240.224.0/20

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

ASN historyEvery routed prefix covering 173.240.224.0/20

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
173.240.224.0/20	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing

More specific routes16 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
173.240.224.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.225.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.226.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.227.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.228.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.229.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.230.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.231.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.232.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.233.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.234.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.235.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.236.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.237.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.238.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing
173.240.239.0/24	AS12268	Elizabethtown College	United States	Before monitoring	2026-10-23 20:21	Announcing

Change logAll changes

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

Look up another address

RIR allocation record

Registry: ARIN
Allocated block: 173.240.224.0/20
Country: United States
Allocation date: 2010-04-16
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.