47.221.128.0/17

Currently announced by AS19108 Suddenlink Communications, in the routed prefix 47.221.128.0/17.

Current ASN: AS19108; Suddenlink Communications
Routed prefix: 47.221.128.0/17; 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 47.221.128.0/17

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
47.221.128.0/17	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
47.221.128.0/23	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.130.0/23	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.132.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.136.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.140.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.144.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.148.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.152.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.156.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.160.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.164.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.168.0/21	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.176.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.180.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.184.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.188.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.192.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.196.0/23	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.198.0/23	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.208.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.212.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.216.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.220.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.224.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.228.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.232.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.236.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.240.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.244.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.248.0/22	AS19108	Suddenlink Communications	United States	2026-10-29 10:22	2026-10-29 12:20	Stopped
47.221.252.0/22	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.

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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.