64.33.224.0/19

Currently announced by AS13576 South Dakota Network dba SDN Communications, in the routed prefix 64.33.224.0/19.

Current ASN: AS13576; South Dakota Network dba SDN Communications
Routed prefix: 64.33.224.0/19; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: ARIN; United States · 64.33.224.0/19

Routing data · Nov 2, 2026, 02:24 UTC

ASN historyEvery routed prefix covering 64.33.224.0/19

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
64.33.224.0/19	AS13576	South Dakota Network dba SDN Communications	United States	Before monitoring	2026-11-02 02:24	Announcing

More specific routes14 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
64.33.224.0/21	AS15204	INTERSTATE TELECOMMUNICATIONS COOPERATIVE, INC.	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.224.0/22	AS15204	INTERSTATE TELECOMMUNICATIONS COOPERATIVE, INC.	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.228.0/22	AS15204	INTERSTATE TELECOMMUNICATIONS COOPERATIVE, INC.	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.234.0/23	AS399439	Mitchell Telecom	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.236.0/24	AS13576	South Dakota Network dba SDN Communications	United States	2026-10-29 10:22	2026-11-02 02:24	Announcing
64.33.238.0/24	AS20014	West River Cooperative Telephone Company	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.239.0/24	AS18785	Santel Communications Cooperative, Inc.	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.240.0/24	AS399439	Mitchell Telecom	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.242.0/24	AS20014	West River Cooperative Telephone Company	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.243.0/24	AS63172	Venture Communications Cooperative	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.246.0/24	AS399439	Mitchell Telecom	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.247.0/24	AS13576	South Dakota Network dba SDN Communications	United States	2026-10-29 10:22	2026-11-02 02:24	Announcing
64.33.250.0/24	AS18785	Santel Communications Cooperative, Inc.	United States	Before monitoring	2026-11-02 02:24	Announcing
64.33.252.0/24	AS13576	South Dakota Network dba SDN Communications	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: 64.33.224.0/19
Country: United States
Allocation date: 2002-08-06
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.