143.170.0.0/16

Currently announced by AS16504 Granite Telecommunications, in the routed prefix 143.170.0.0/16.

Current ASN: AS16504; Granite Telecommunications
Routed prefix: 143.170.0.0/16; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 143.170.0.0/16

Routing data · Nov 2, 2026, 02:24 UTC

ASN historyEvery routed prefix covering 143.170.0.0/16

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
143.170.0.0/16	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing

More specific routes31 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
143.170.0.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.8.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.16.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.24.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.60.0/22	AS16504	Granite Telecommunications	United States	2026-10-29 18:21	2026-11-02 02:24	Announcing
143.170.64.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.72.0/22	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.76.0/22	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.80.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.88.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.96.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.104.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.112.0/22	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.116.0/22	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.120.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.128.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.136.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.144.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.152.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.160.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.168.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.176.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.184.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.192.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.200.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.208.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.216.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.224.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.232.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.240.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	Announcing
143.170.248.0/21	AS16504	Granite Telecommunications	United States	Before monitoring	2026-11-02 02:24	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: 143.170.0.0/16
Country: United States
Allocation date: 2017-03-07
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.