47.221.0.0/17

Currently announced by AS19108 Suddenlink Communications, in the routed prefix 47.221.0.0/17.

Current ASN: AS19108; Suddenlink Communications
Routed prefix: 47.221.0.0/17; Most specific route covering this prefix
ASNs over time: 1; 3 announcement records
RIR allocation: ARIN; United States · 47.208.0.0/12

Routing data · Nov 2, 2026, 02:24 UTC

ASN historyEvery routed prefix covering 47.221.0.0/17

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
47.221.0.0/17	AS19108	Suddenlink Communications	United States	Before monitoring	2026-11-02 02:24	Announcing
47.220.0.0/14	AS19108	Suddenlink Communications	United States	Before monitoring	2026-11-02 02:24	Announcing
47.208.0.0/12	AS19108	Suddenlink Communications	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
47.221.0.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.4.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.8.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.12.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.16.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.20.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.24.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.28.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.32.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.36.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.40.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.44.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.56.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.60.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.64.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.68.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.72.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.76.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.80.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.84.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.88.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.92.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.96.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.100.0/23	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.102.0/23	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.104.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.108.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.112.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.116.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.120.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.124.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped

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: 47.208.0.0/12
Country: United States
Allocation date: 2015-09-08
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.