AS15974 — VTT-AS ISP, Saratov, Russia.

AS15974 announces 6 IPv4 prefixes covering 45,312 addresses and 17 IPv6 prefixes.

About this network

Each reverse name ends with a three-letter code for the city the line terminates in.

What it's used for

• A regional arm of a national carrier. Twenty-six IPv4 prefixes and eighteen IPv6 prefixes announced from the Russian Federation, forty-five thousand three hundred and twelve addresses, across five observed BGP neighbours.

Notable

• Ten of eighteen queried addresses answered. Every name is the access protocol, then the four octets hyphenated, then a label marking the address as changeable, then three letters for a city, then a retail subdomain.
• Three different city codes appear among ten answers, so one block spans several towns.
• Nearly all netnames are a country code, the parent carrier's full brand, and a date, with the oldest from the very start of the century.
• One block breaks the pattern with the local brand, the access protocol and a city name spelled out, and lists three contacts where the others list two.
• The AS handle appends the letters for a provider, a city and a country, and ends with a full stop.
• The eighteen IPv6 prefixes are nested pieces of one range, from a /36 down to a /48.

Interesting

• Writing the access technology into the name tells any receiving network that the address belongs to a consumer line, which is exactly what mail and abuse systems want to know before deciding how to treat traffic from it.
• A local brand surviving on one block while the parent's name covers the rest is what a regional operator looks like a few years after being absorbed.

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

Announced prefixes

• 83.234.164.0/22
• 93.157.208.0/21
• 185.44.120.0/22
• 193.22.6.0/24
• 213.80.128.0/17
• 217.23.64.0/19
• 2a02:e840::/35
• 2a02:e840:1003::/48
• 2a02:e840:1004::/46
• 2a02:e840:1008::/45
• 2a02:e840:1010::/44
• 2a02:e840:1020::/43
• 2a02:e840:1040::/42
• 2a02:e840:1080::/41
• 2a02:e840:1100::/40
• 2a02:e840:1200::/39
• 2a02:e840:1400::/38
• 2a02:e840:1800::/37
• 2a02:e840:2000::/35
• 2a02:e840:4000::/34
• 2a02:e840:8000::/33
• 2a02:e841::/32
• 2a02:e842::/32

Upstream networks

• AS20485 Joint Stock Company TransTeleCom

Downstream networks

• AS15774 Limited Liability Company "TTK-Svyaz"
• AS58084 Newcontact ltd.
• AS5543 Joint Stock Company TransTeleCom
• AS8485 Joint Stock Company TransTeleCom

Adjacent networks

• AS20485 Joint Stock Company TransTeleCom
• AS15774 Limited Liability Company "TTK-Svyaz"
• AS58084 Newcontact ltd.
• AS5543 Joint Stock Company TransTeleCom
• AS8485 Joint Stock Company TransTeleCom