37.15.0.0/16

Currently announced by AS12479 Orange Spain, in the routed prefix 37.15.0.0/16.

Current ASN: AS12479; Orange Spain
Routed prefix: 37.15.0.0/16; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: RIPENCC; Spain · 37.14.0.0/15

Routing data · Nov 1, 2026, 22:23 UTC

ASN historyEvery routed prefix covering 37.15.0.0/16

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
37.15.0.0/16	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing

More specific routes96 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
37.15.0.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.2.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.3.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.4.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.6.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.7.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.8.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.9.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.10.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.11.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.13.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.14.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.15.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.16.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.17.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.18.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.19.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.20.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.22.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.23.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.25.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.26.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.28.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.30.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.32.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.36.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.37.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.38.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.40.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.44.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.47.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.48.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.52.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.56.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.57.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.58.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.59.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.60.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.64.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.68.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.72.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.76.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.80.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.84.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.88.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.92.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.96.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.100.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.104.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.108.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.112.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.116.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.120.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.124.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.128.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.132.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.136.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.140.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.144.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.148.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.150.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.151.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.152.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.154.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.156.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.160.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.164.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.168.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.170.0/23	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.172.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.176.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.180.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.184.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.188.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.192.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.195.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.196.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.197.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.198.0/24	AS12479	Orange Spain	Spain	2026-10-26 10:20	2026-11-01 22:23	Announcing
37.15.200.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.204.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.208.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.212.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.216.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.220.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.221.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.222.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.223.0/24	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.224.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.228.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.232.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.236.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.240.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.244.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.248.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing
37.15.252.0/22	AS12479	Orange Spain	Spain	Before monitoring	2026-11-01 22:23	Announcing

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: RIPENCC
Allocated block: 37.14.0.0/15
Country: Spain
Allocation date: 2011-12-16
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.