Autonomous system
AS197479 GREFNET-AS
Unclassified RIPE
Summary
GREFNET
isp residential poland small
GREFNET-AS is operated by GREFNET, a small Polish internet service provider.
What it's used for
- The address space carries residential or small-business subscriber traffic, as indicated by the reverse DNS domain
grefnet.pland the netnameGREFNET. - The AS announces 1024 IPv4 addresses across 2 prefixes and maintains 7 routing neighbours, a ratio consistent with a local access network rather than a transit provider.
- Traffic from this AS consists of end-user internet access for subscribers in Poland.
Notable
- The RDAP registrants for both announced prefixes list "GREFNET" Miroslaw Grefkowicz, which agrees with the AS holder.
- The address inventory is compact, consisting of two contiguous /23 blocks within the 91.222.144.0/22 range.
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 | 195.149.233.76 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 1.02K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 2 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS197479- Registry name
- GREFNET-AS
- Registrant
- "GREFNET" Miroslaw Grefkowicz
- Abuse contact
- michal@grefnet.pl
- Registered
- 2010-12-20
- Last changed
- 2021-07-11
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 4 valid, 0 with no ROA
- ROAs
- 5 authorising AS197479
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 5 naming AS197479
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: 447 networks and 1,843 prefixes, as published 2026-11-01. 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