AS10109 — TOPNET-AS-MN-AP Topica LLC, Internet Service Provider,Ulaanbaatar, Mongolia
AS10109 announces 1 IPv4 prefixes covering 2,048 addresses and 1 IPv6 prefixes.
About this network
TOPNET-AS-MN-AP is Topica LLC, a small internet service provider in Ulaanbaatar, Mongolia. Founded in 2005 by a group of electronics and IT engineers, it trades as TopNET and sells corporate internet access and data-centre services to Mongolian businesses.
What it's used for
Serving business customers in and around the Mongolian capital. The AS announces 8 IPv4 prefixes totalling 2,048 addresses — the eight contiguous /24s of 119.40.96.0/21, deaggregated one by one rather than announced as a single block — plus one IPv6 /32. Announcing a /21 as eight /24s is ordinary practice for a small provider that wants each block to survive independently and to keep options open for multi-homing later.
Notable
The routing shape says end-site provider, not carrier. Around 2,000 addresses against 2 observed BGP neighbours places this firmly at the edge of the network: it buys transit from a small number of upstreams and resells to end customers, whereas a wholesale operator would be seen with hundreds of neighbours. The size is telling in the other direction too. A national eyeball ISP with a mass-market broadband product would need far more than 2,048 addresses even behind carrier NAT, so this is best read as a corporate and SME provider rather than a consumer one.
Interesting
An IPv6 /32 alongside only a /21 of IPv4 is a common shape for small APNIC members: v6 is allocated generously by policy, so even tiny providers hold a v6 block that dwarfs their entire v4 estate.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 119.40.96.0/21
- 2400:d4e0::/32
Upstream networks
- AS45204 GEMNET LLC
Downstream networks
- AS152337 National University of Mongolia
Adjacent networks
awaiting query
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