AS15721 — CTCO Riga, Latvia

AS15721 announces 1 IPv4 prefixes covering 2,048 addresses and 0 IPv6 prefixes.

About this network

Dots inside the company abbreviation, a city and a country inside the AS handle.

What it's used for

• A software company's network. One IPv4 /21 announced from Latvia, no IPv6, two thousand and forty-eight addresses, across four observed BGP neighbours.

Notable

• The registered holder name puts a full stop after each letter of the abbreviation and another after the last pair, so four dots appear before the legal form.
• The AS handle drops those dots and adds a city and a country, separated by a comma.
• The single block's netname is the country code, the undotted abbreviation and an allocation date from the same period the number was first seen.
• Three contacts are listed: a hostmaster, the company, and the company's own abuse contact rather than the registry's generic role.
• All three sampled addresses answer, each with the four octets hyphenated in order under the company domain, including the network address of its subnet.

Interesting

• Dots in a company name are harmless in a registry field and awkward everywhere a name gets turned into an identifier. Every other field in this record silently drops them, which is why the netname and the handle disagree with the holder.
• Four upstreams for a single small block is unusual. The address count says a modest office network; the neighbour count says one that is expected to stay reachable when any single path fails.

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

Announced prefixes

• 217.21.168.0/21

Upstream networks

• AS12578 SIA Tet
• AS197870 S.I.A."IBANPAY"

Adjacent networks

• AS197870 S.I.A."IBANPAY"
• AS12578 SIA Tet
• AS9002 RETN Limited
• AS28886 RETN Limited

Routing security

• RPKI: 3 valid, 0 invalid and 0 not-found announcements; 1 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 7 route objects.
• Listed in as-sets: AS-ARMORCLOUD, AS-BELPAK, AS-LATTELEKOM, AS-LATVIA, AS-LIXLV, AS-NIC-LV, AS-RETN, AS-RETN-ACTUAL-V4, AS-RETNLV, AS-TRANSROUTE-MNOGOBYTE.