AS15991 — Swedish_Tax_Agency Swedish Tax Agency

AS15991 announces 1 IPv4 prefixes covering 65,536 addresses and 1 IPv6 prefixes.

About this network

A tax authority holding a whole /16, with its department and street address in the AS handle.

What it's used for

• A national tax authority's network. One IPv4 /16 and one IPv6 /32 announced from Sweden, sixty-five thousand five hundred and thirty-six addresses, across two observed BGP neighbours.

Notable

• The AS handle is the agency's name in capitals with underscores, then its department, a street, a postcode, a town and a country. Most of the field is a postal address.
• The netname is a five-letter contraction of the agency's name in the local language, followed by a hyphen and a single digit, as if it were the third of a series.
• The registrants are the agency and an abuse contact, and nothing else.
• Two upstreams for sixty-five thousand addresses.
• Three addresses were queried for reverse DNS and one returned a name: the four octets hyphenated, a label marking the address as fixed, and the agency's own domain.

Interesting

• A /16 is an enormous allocation by modern standards, and tax authorities were exactly the kind of organisation that could justify one when address space was assigned on a stated plan rather than demonstrated use. Nothing has forced it to give the space back.
• Two upstreams is a modest shape for an agency this size, and it is the whole story visible from outside: everything else about how a tax authority connects is arranged privately.

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

Announced prefixes

• 137.61.0.0/16
• 2a03:b100::/32

Upstream networks

• AS1257 Tele2 Sverige AB
• AS3301 Telia Company AB

Adjacent networks

• AS1257 Tele2 Sverige AB
• AS3301 Telia Company AB

Routing security

• RPKI: 2 valid, 0 invalid and 0 not-found announcements; 2 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 2 route objects.
• Listed in as-sets: AS-TELE2-SE, AS-TELIANETSE, AS-TELIANETSE-V6, AS3246:AS-CUSTOMERS.