2001:1248:3140::/42

Currently announced by AS11172 Alestra, in the routed prefix 2001:1248:3140::/42.

Current ASN: AS11172; Alestra
Routed prefix: 2001:1248:3140::/42; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: LACNIC; Mexico · 2001:1248::/32

Routing data · Nov 2, 2026, 00:27 UTC

ASN historyEvery routed prefix covering 2001:1248:3140::/42

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2001:1248:3140::/42	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing

More specific routes34 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2001:1248:315b::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:315c::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:315d::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:315e::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:315f::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3160::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3161::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3162::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3163::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3164::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3165::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3167::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3168::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3169::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:316a::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:316b::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:316c::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:316d::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:316e::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:316f::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3170::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3171::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3172::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3173::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3174::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3175::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3176::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3177::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:3178::/48	AS11172	Alestra	Mexico	2026-10-20 02:19	2026-11-02 00:27	Announcing
2001:1248:3179::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:317b::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:317c::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:317d::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	Announcing
2001:1248:317e::/48	AS11172	Alestra	Mexico	Before monitoring	2026-11-02 00:27	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: LACNIC
Allocated block: 2001:1248::/32
Country: Mexico
Allocation date: 2008-01-08
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.