Autonomous system
AS12737 RIGHTSIDE16
Unclassified APNIC
Summary
KrasPromStroy (RightSide)
hosting isp business
A reverse zone with the wrong octet baked in: addresses in .245 and .246 all answer as .244.
What it's used for
- Hosting and access in Russia. 12,288 addresses in thirteen IPv4 prefixes, nine observed BGP neighbours, and no IPv6 announced.
Notable
- Seventeen of eighteen sampled addresses answered, all under
rightside.ruwith the octets reversed. - Three of them are wrong:
185.82.245.0,185.82.245.255and185.82.246.254answer as0.244.82.185,255.244.82.185and254.244.82.185. - Blocks are registered to three related holders: KrasPromStroy LLC, Maxima LLC and KPS LLC.
- Netnames pair up by date:
RU-KRASPROMSTROY-20180220andRU-MAXIMAN-20180220were filed the same day. - First observed in the routing archive in October 2015.
Interesting
- Those three names are a generated zone with a constant where a variable should be. The template that produced them substituted the last octet correctly and hardcoded the third at
244, the first block in the/22, so every address across four/24s claims to live in the first one. Nothing breaks, because almost nothing checks that a reverse name resolves back to the address it came from. - Two holders filing allocations on the same day, twice, is one operation with more than one legal entity. The registry records the entities; the reverse DNS records the operation, and here it puts all of them under a single domain that matches neither company name.
- October 2015 is a genuine first appearance rather than the floor of the archive, so this network started announcing then, on an AS number issued long before.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 13 prefixes · 12.29K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| RU | Russian Federation | 13 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS12737- Registry name
- RIGHTSIDE16
- Registrant
- KrasPromStroy, LLC
- Abuse contact
- abuse@rightside.ru
- Registered
- 2015-09-23
- Last changed
- 2026-09-01
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 27 with no ROA
- ROAs
- 0 authorising AS12737
- ASPA
- no ASPA record
- IRR
- 96% registered · 26 of 27 announcements 1 other origin
- Route objects
- 28 naming AS12737
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,783 prefixes, as published 2026-10-17. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere