66.225.192.0/18

Currently announced by AS23352 Summit, in the routed prefix 66.225.192.0/18.

Current ASN: AS23352; Summit
Routed prefix: 66.225.192.0/18; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 66.225.192.0/18

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

ASN historyEvery routed prefix covering 66.225.192.0/18

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
66.225.192.0/18	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing

More specific routes39 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
66.225.192.0/24	AS33633	USG Corporation, Inc.	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.193.0/24	AS212238	CDNEXT	United Kingdom	Before monitoring	2026-10-23 20:21	Announcing
66.225.194.0/23	AS36352	ColoCrossing	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.196.0/24	AS212238	CDNEXT	United Kingdom	Before monitoring	2026-10-23 20:21	Announcing
66.225.197.0/24	AS30081	CacheFly	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.198.0/24	AS36352	ColoCrossing	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.199.0/24	AS212238	CDNEXT	United Kingdom	Before monitoring	2026-10-23 20:21	Announcing
66.225.200.0/24	AS54004	Lightpath	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.201.0/24	AS23352	Summit	United States	2026-10-23 14:22	2026-10-23 20:21	Announcing
66.225.206.0/23	AS393713	All Points Broadband	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.208.0/24	AS30081	CacheFly	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.209.0/24	AS9009	M247 Global	Romania	Before monitoring	2026-10-23 20:21	Announcing
66.225.210.0/23	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.212.0/24	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.214.0/24	AS30081	CacheFly	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.216.0/22	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.221.0/24	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.222.0/24	AS30081	CacheFly	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.228.0/23	AS19318	InterServer	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.228.0/24	AS198566	FZCO	United Arab Emirates	Before monitoring	2026-10-23 20:21	Announcing
66.225.230.0/24	AS3257	GTT Communications (AS3257)	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.231.0/24	AS36352	ColoCrossing	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.232.0/24	AS36352	ColoCrossing	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.235.0/24	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.236.0/24	AS20853	ETOP Sp z o.o.	Poland	Before monitoring	2026-10-23 20:21	Announcing
66.225.237.0/24	AS25773	Radware 25773	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.238.0/24	AS212238	CDNEXT	United Kingdom	Before monitoring	2026-10-23 20:21	Announcing
66.225.241.0/24	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.242.0/24	AS212238	CDNEXT	United Kingdom	Before monitoring	2026-10-23 20:21	Announcing
66.225.243.0/24	AS30081	CacheFly	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.244.0/24	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.245.0/24	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.246.0/24	AS23352	Summit	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.251.0/24	AS393713	All Points Broadband	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.252.0/24	AS209242	Cloudflare London	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.253.0/24	AS5065	Bunny Communications	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.254.0/24	AS399486	Virtuo.Host (AS399486)	Canada	Before monitoring	2026-10-23 20:21	Announcing
66.225.255.0/24	AS40676	Psychz Networks	United States	Before monitoring	2026-10-23 20:21	Announcing
66.225.255.0/24	AS22773	Cox Communications	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.

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RIR allocation record

Registry: ARIN
Allocated block: 66.225.192.0/18
Country: United States
Allocation date: 2003-06-10
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.