AS12594 — EXTERNET-AS

AS12594 announces 2 IPv4 prefixes covering 12,288 addresses and 1 IPv6 prefixes.

About this network

A Hungarian provider that writes its customers' addresses in hexadecimal.

What it's used for

• Internet access in Hungary. 12,288 addresses in two IPv4 prefixes, one IPv6 prefix, and one observed BGP neighbour.

Notable

• 212.40.96.0/19 is netname HU-UHUSYS-19990816; 217.173.32.0/20 is HU-UHUSYS-20010406.
• The registrant is Comnica Kft., the netname says UHUSYS, and the reverse zone is externet.hu — three names for one network.
• All six sampled addresses answered, as static-68-0000, static-6f-00ff, pool-dsl-77-00fe, pool-cab-24-0000, pool-dsl-27-00ff and pool-dsl-2b-00fe.
• The IPv6 announcement is 2a02:558::/32.

Interesting

• Those numbers are hexadecimal. 212.40.104.0 becomes static-68-0000 because 104 is 0x68; 217.173.43.254 becomes pool-dsl-2b-00fe. Nearly every network on the Internet writes reverse names in decimal, so a customer reading their own hostname here has to convert before it matches the address in their router. Somebody generated these from raw bytes and never translated back.
• The last octet gets four hex digits where two would do, which is what happens when a template is written for a wider field than the data needs.
• The prefixes are honest about what they carry: static for fixed assignments, pool-dsl and pool-cab for the two access technologies. The reverse zone is a map of the access network, readable by anyone willing to do the arithmetic.
• 19990816 spells its year in full, the third netname in this range to do so.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 212.40.96.0/19
• 217.173.32.0/20
• 2a02:558::/32

Upstream networks

• AS62214 Rackforest Zrt.

Adjacent networks

• AS62214 Rackforest Zrt.