64.186.240.0/20

Currently announced by AS3257 GTT Communications (AS3257), in the routed prefix 64.186.224.0/19.

Current ASN: AS3257; GTT Communications (AS3257)
Routed prefix: 64.186.224.0/19; Most specific route covering this prefix
ASNs over time: 2; 2 announcement records
RIR allocation: ARIN; United States · 64.186.224.0/19

Routing data · Nov 1, 2026, 20:20 UTC

ASN historyEvery routed prefix covering 64.186.240.0/20

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
64.186.240.0/20	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 04:25	Stopped
64.186.224.0/19	AS3257	GTT Communications (AS3257)	United States	Before monitoring	2026-11-01 20:20	Announcing

More specific routes16 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
64.186.240.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.241.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.242.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.243.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.244.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.245.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.246.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.247.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.248.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.249.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.250.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.251.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.252.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.253.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.254.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing
64.186.255.0/24	AS906	DMIT Cloud Infrastructure	United States	Before monitoring	2026-11-01 20:20	Announcing

Change logAll changes

Detected (UTC)	Prefix	Change	ASN	Name	Previous ASN	Country
2026-11-01 06:24	64.186.240.0/20	Withdrawal	AS906	DMIT Cloud Infrastructure	—	United States

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RIR allocation record

Registry: ARIN
Allocated block: 64.186.224.0/19
Country: United States
Allocation date: 2001-08-03
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.