AS51004 — SCTS-AS

AS51004 announces 2 IPv4 prefixes covering 17,408 addresses and 1 IPv6 prefixes.

About this network

SCTS-AS is operated by Sakhalin Cable Telesystems Ltd.

What it's used for

• The address space carries residential cable subscriber traffic, evidenced by reverse DNS names such as ip-188-113-155-254.z27.ysk.scts.tv and broadcast.z23.ysk.scts.tv, with ysk indicating Yuzhno-Sakhalinsk.
• The AS announces 17,408 IPv4 addresses across 28 prefixes and 1 IPv6 prefix, while maintaining only 5 observed neighbours, a ratio characteristic of an access network rather than a transit provider.
• Traffic consists of subscriber eyeballs for cable television and internet services in the Sakhalin region, consistent with the operator's business as a regional cable television system.

Notable

• All registrants in the RDAP data are Sakhalin Cable Telesystems Ltd, matching the AS holder and confirming a single-organisation estate.
• The inventory is finely subdivided into /22, /23, and /24 blocks, reflecting site-by-site segmentation typical of a regional cable operator managing distinct headend or node locations.

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

Announced prefixes

• 185.74.228.0/22
• 188.113.128.0/18
• 2a00:e2a0::/32

Upstream networks

• AS12389 PJSC Rostelecom
• AS20485 Joint Stock Company TransTeleCom

Downstream networks

• AS196721 Administration of Sakhalin Region
• AS47407 MKU "Digital Transformation of the City Administration of Yuzhno-Sakhalinsk"

Adjacent networks

• AS12389 PJSC Rostelecom
• AS20485 Joint Stock Company TransTeleCom
• AS196721 Administration of Sakhalin Region
• AS47407 MKU "Digital Transformation of the City Administration of Yuzhno-Sakhalinsk"

Routing security

• RPKI: 0 valid, 0 invalid and 37 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 95% of announcements registered; 71 route objects.
• Listed in as-sets: AS-BLOCK-SET, AS-BLOCKED-RU, AS-HURRICANE, AS-HURRICANEV6, AS-MTS-SAKH, AS-SNCNET, AS-SOLNCE, AS-TTK.