38.246.248.0/21

Currently announced by AS979 NETLAB-SDN, in the routed prefix 38.246.248.0/21.

Current ASN: AS979; NETLAB-SDN
Routed prefix: 38.246.248.0/21; Most specific route covering this prefix
ASNs over time: 2; 2 announcement records
RIR allocation: ARIN; United States · 38.0.0.0/8

Routing data · Nov 8, 2026, 10:26 UTC

ASN historyEvery routed prefix covering 38.246.248.0/21

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
38.246.248.0/21	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.0.0.0/8	AS174	Cogent Communications, Inc.	United States	Before monitoring	2026-11-08 10:26	Announcing

More specific routes20 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
38.246.248.0/22	AS1014	Japan Networks	United States	2026-11-02 18:22	2026-11-08 10:26	Announcing
38.246.248.0/22	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.248.0/24	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.249.0/24	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.250.0/24	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.251.0/24	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.252.0/22	AS1014	Japan Networks	United States	2026-11-02 18:22	2026-11-08 10:26	Announcing
38.246.252.0/22	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.252.0/24	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.253.0/24	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.254.0/24	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.255.0/24	AS979	NETLAB-SDN	United States	Before monitoring	2026-11-08 10:26	Announcing
38.246.248.0/24	AS1014	Japan Networks	United States	Before monitoring	2026-11-02 16:44	Stopped
38.246.249.0/24	AS1014	Japan Networks	United States	Before monitoring	2026-11-02 16:44	Stopped
38.246.250.0/24	AS1014	Japan Networks	United States	Before monitoring	2026-11-02 16:44	Stopped
38.246.251.0/24	AS1014	Japan Networks	United States	Before monitoring	2026-11-02 16:44	Stopped
38.246.252.0/24	AS1014	Japan Networks	United States	2026-10-22 06:20	2026-10-22 08:21	Stopped
38.246.253.0/24	AS1014	Japan Networks	United States	Before monitoring	2026-11-02 16:44	Stopped
38.246.254.0/24	AS1014	Japan Networks	United States	Before monitoring	2026-11-02 16:44	Stopped
38.246.255.0/24	AS1014	Japan Networks	United States	2026-10-22 06:20	2026-10-22 08:21	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: 38.0.0.0/8
Country: United States
Allocation date: 1991-04-16
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.