AS10165 — CUSTOMS-AS-KR KOREA CUSTOMS SERVICE
AS10165 announces 2 IPv4 prefixes covering 1,536 addresses and 0 IPv6 prefixes.
About this network
CUSTOMS-AS-KR belongs to the Korea Customs Service (관세청), the national customs administration under the Ministry of Economy and Finance, responsible for clearing imports and exports at Korea's ports and airports and for collecting customs duties.
What it's used for
- The agency's internet-facing systems, above all the UNI-PASS electronic customs clearance platform that brokers, forwarders and traders use to file declarations, plus its public web presence.
Notable
This is a straightforward government network. The pack shows six announced IPv4 prefixes carrying 1,536 addresses and two observed BGP neighbours, with no IPv6.
Two things follow. First, the role: two upstreams and no peers is a dual-homed end site. It buys transit twice for resilience and announces nothing on anyone else's behalf, which excludes every provider kind — a customs service is a consumer of connectivity, not a seller of it, and the routing table agrees. Second, the shape of the space is telling: the six prefixes are six consecutive /24s, 211.173.40.0/24 through 211.173.45.0/24. That is a single contiguous 211.173.40.0/21-worth of address space deliberately deaggregated into individual /24s, the standard trick for steering inbound traffic across two upstreams. A network doing traffic engineering at that granularity over 1,536 addresses is running services that matter and must stay reachable.
Interesting
- Customs clearance is a hard dependency for import-heavy supply chains, so this small block quietly sits in front of a system a large share of Korean trade passes through.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 211.173.40.0/22
- 211.173.44.0/23
Upstream networks
Adjacent networks
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