148.204.224.0/19

Currently announced by AS3484 Instituto Politecnico Nacional, in the routed prefix 148.204.224.0/19.

Current ASN: AS3484; Instituto Politecnico Nacional
Routed prefix: 148.204.224.0/19; Most specific route covering this prefix
ASNs over time: 1; 3 announcement records
RIR allocation: LACNIC; Mexico · 148.204.0.0/16

Routing data · Nov 2, 2026, 00:27 UTC

ASN historyEvery routed prefix covering 148.204.224.0/19

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
148.204.224.0/19	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.128.0/17	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.0.0/16	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing

More specific routes16 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
148.204.224.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.225.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.228.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.229.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.230.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.231.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.232.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.233.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.234.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.236.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.237.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.238.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.239.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.240.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.248.0/24	AS3484	Instituto Politecnico Nacional	Mexico	Before monitoring	2026-11-02 00:27	Announcing
148.204.250.0/24	AS3484	Instituto Politecnico Nacional	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.

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RIR allocation record

Registry: LACNIC
Allocated block: 148.204.0.0/16
Country: Mexico
Allocation date: 1992-06-24
Status: assigned

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.