AS12688 BAIKALTRANSTELECOM Irkutsk, Russia

35,840 addresses in Irkutsk, allocated in five separate applications across two years, reached through one neighbour.

What it's used for

• Regional access for a branch of a Russian national carrier. 35,840 addresses in seven IPv4 prefixes, one observed BGP neighbour, and no IPv6 announced.

Notable

• Five blocks carry dated netnames from the same holder: RU-TRANSTELECOM-20110322, 20110627, 20111124, 20120125 and 20120914, with 20121214 on a sixth.
• 141.105.48.0/21 is netname RU-BTTK, registered to SibTransTelecom through a contact named GIS KTTK Sibir.
• The technical contact on the rest is TTC NOC.
• Eighteen sampled addresses were queried and none returned a name.

Interesting

• Six allocations in twenty-one months is the rhythm of a network that grew steadily and asked for more space each time it ran out. Registries stopped handing out large blocks well before 2011, so an operator needing 35,840 addresses had to collect them a /19 at a time and announce each one separately, which is why the routing table shows seven entries where one would have done a decade earlier.
• A single observed neighbour against that much address space marks this as a branch rather than an independent operator. Everything reaches the rest of the Internet through the parent company, and the branch exists in routing terms only because someone wanted its region administratively separate.
• BTTK and KTTK differ by one letter and name two different regional subsidiaries of the same group. Corporate acronyms make poor identifiers, and the registry preserves every variant anyone ever filed.