Autonomous system
AS57121 IT-SYSTEMATIC-GROUP
Residential RIPE
Summary
IT Systematic Group
isp residential poland cable
The AS handle IT-SYSTEMATIC-GROUP is held by IT Systematic Group.
What it's used for
- The address space carries residential and business customer traffic, evidenced by reverse DNS entries like
176-96-171-254.host.systematic.pland netnamesPL-SYSTEMATIC-20110722andPL-SYSTEMATIC-20191004. - The network announces 7,424 IPv4 addresses across 5 prefixes and maintains 8 observed neighbours, a ratio consistent with a regional access provider rather than a transit carrier.
- As a cable and DSL ISP, the traffic consists of subscriber eyeballs and local business connectivity within its service area in Poland.
Notable
- All registrants for the announced prefixes are listed as Piotr Bukowczyk trading as IT Systematic Group, matching the AS holder.
- The inventory consists of five distinct IPv4 blocks, including a /20 and a /21, all located in Poland.
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.
Transit providers
6 upstream, 0 downstream and 6 adjacent networks observed; most-used upstreams first.
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 5 prefixes · 7.42K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 5 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS57121- Registry name
- IT-SYSTEMATIC-GROUP
- Registrant
- MNT-GOODHOST
- Abuse contact
- abuse@systematic.pl
- Registered
- 2011-07-25
- Last changed
- 2019-10-09
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 5 valid, 0 with no ROA
- ROAs
- 5 authorising AS57121
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 6 naming AS57121
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: 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