Autonomous system
AS205813 MONTMAY
Residential RIPE
Summary
Montmay
isp residential cable dsl
The AS handle MONTMAY is held by Montmay Sp. z o.o.
What it's used for
- The address space carries residential and business internet access, evidenced by reverse DNS entries such as
smtp-0.mx.tsunami.plandip-81-15-239-64.by.tsunami-network.com. - The network announces 1536 IPv4 addresses across 3 prefixes and maintains 9 observed neighbours, a ratio consistent with a regional access provider rather than a transit carrier.
- Traffic from this AS consists of subscriber eyeballs for the Tsunami brand, including web browsing, email, and general internet services for end-users in Poland.
Notable
- Registrants for the 81.15.239.0/24 and 81.15.242.0/24 prefixes are listed as ABUSE EXATEL, while the 185.204.192.0/22 prefix is registered to Montmay Sp. z o.o., indicating a mix of owned and potentially leased or historically associated address space.
- The inventory is composed of one /22 and two /24 blocks, all located in Poland, with no IPv6 prefixes currently announced.
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
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| TPIX - Internet Exchange | Warsaw, Poland | 195.149.233.101 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-30, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 1.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS205813- Registry name
- MONTMAY
- Registrant
- Montmay Sp. z o.o.
- Abuse contact
- abuse@montmay.pl
- Registered
- 2017-05-29
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 6 valid, 0 with no ROA
- ROAs
- 7 authorising AS205813
- ASPA
- no ASPA record
- IRR
- 100% registered · 6 of 6 announcements
- Route objects
- 9 naming AS205813
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 447 networks and 1,849 prefixes, as published 2026-10-30. 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