AS12597 — GOTANET

AS12597 announces 9 IPv4 prefixes covering 16,384 addresses and 1 IPv6 prefixes.

About this network

Twenty announcements that add up to two /19s, under a netname dated March 1998.

What it's used for

• Fibre access in Sweden. 16,384 addresses in 20 IPv4 prefixes, one IPv6 prefix, and 29 observed BGP neighbours.

Notable

• Eight of the announcements tile 212.3.0.0/19 exactly, in pieces from /24 to /20.
• Ten more cover 62.80.192.0/19 apart from two single /24s, at 62.80.203.0 and 62.80.205.0.
• The netnames are SE-LEISSNER-980312 and SE-LEISSNER-20011012, registered to Leissner Data AB — a different name from the AS holder, Gotalandsnatet AB.
• Sampled addresses answer dynamic.cust254.27.ftth.gotanet.se, dynamic.cust254.6.ftth.gotanet.se and oxygen.webway.se.
• The IPv6 announcement is 2a02:920::/32.

Interesting

• Announcing a /19 as eight separate pieces sends eight routes where one would carry the same traffic. Every router on the Internet stores all eight. Deaggregation on this scale is usually the residue of blocks that were once handled separately and never merged back, and it outlives whatever reason produced it.
• The two missing /24s in the second range are the more interesting half. A gap in an otherwise complete /19 means those 512 addresses go somewhere else, and finding out where requires looking at whoever else announces them.
• 980312 is the oldest netname date in this stretch of the number range, from a period when the two-digit year still had two years left to run.
• ftth in the reverse names is fibre to the home, and webway.se is a third brand again.

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

Announced prefixes

• 62.80.192.0/21
• 62.80.200.0/23
• 62.80.202.0/24
• 62.80.204.0/24
• 62.80.206.0/23
• 62.80.208.0/20
• 91.231.63.0/24
• 192.150.71.0/24
• 212.3.0.0/19
• 2a02:920::/32

Upstream networks

• AS1257 Tele2 Sverige AB
• AS6939 Hurricane Electric LLC
• AS50304 Blix Solutions AS
• AS24482 SG.GS
• AS20764 CJSC RASCOM
• AS3303 Swisscom (Schweiz) AG
• AS12552 GlobalConnect AB
• AS5405 Inter.link GmbH
• AS35280 F5 Networks SARL
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS57463 NetIX Communications JSC
• AS20473 The Constant Company, LLC
• AS33891 Core-Backbone GmbH

Downstream networks

• AS3292 TDC Holding A/S
• AS24605 Fassberg Holding AB
• AS198476 Lansstyrelsen i Vastra Gotalands lan

Adjacent networks

• AS1257 Tele2 Sverige AB
• AS6939 Hurricane Electric LLC
• AS3292 TDC Holding A/S
• AS24605 Fassberg Holding AB
• AS50304 Blix Solutions AS
• AS24482 SG.GS
• AS198476 Lansstyrelsen i Vastra Gotalands lan
• AS5405 Inter.link GmbH
• AS20764 CJSC RASCOM
• AS35280 F5 Networks SARL
• AS12552 GlobalConnect AB
• AS3303 Swisscom (Schweiz) AG
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS57463 NetIX Communications JSC
• AS20473 The Constant Company, LLC
• AS33891 Core-Backbone GmbH

Internet exchanges

• Sweden Open Network Internet eXchange Stockholm — Stockholm, Sweden
• STHIX - Stockholm — Stockholm, Sweden
• Stockholm Internet Exchange — Stockholm, Sweden
• Netnod Sundsvall- Gävle — Sundsvall, Sweden