Autonomous system
AS197480 SERCZERNET
Unclassified APNIC Cable/DSL/ISP
Summary
SerczerNET
isp residential cable dsl
The AS handle is SERCZERNET and the holder is SerczerNET Malgorzata Nienaltowska.
What it's used for
- The address space carries residential subscriber traffic, evidenced by reverse DNS entries such as
static-user-178-21-141-254.serczer.plandstatic-user-185-3-226-254.serczer.pl. - The network announces 3072 IPv4 addresses across 2 prefixes and maintains 11 observed neighbours, a ratio consistent with a local access provider rather than a transit carrier.
- Traffic from this AS consists of cable and DSL subscriber eyeballs, as indicated by the operator's classification as a Cable/DSL/ISP and the static-user naming convention in the reverse DNS.
Notable
- Both announced prefixes,
178.21.136.0/21and185.3.224.0/22, list SerczerNET Malgorzata Nienaltowska as the registrant, matching the AS holder. - The address inventory is composed of two distinct IPv4 blocks, 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 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| TPIX - Internet Exchange | Warsaw, Poland | 195.149.232.194 |
| Equinix Internet Exchange Warsaw | Warsaw, Poland | 195.182.218.118 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, 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 · 3.07K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 2 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS197480- Registry name
- SerczerNET
- Registrant
- SerczerNET Malgorzata Nienaltowska
- Abuse contact
- abuse@serczer.pl
- Registered
- 2010-12-20
- Last changed
- 2018-09-04
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- SerczerNET
- Also known as
- SerczerNET
- Network type
- Cable/DSL/ISP
- Traffic ratio
- Not Disclosed
- Peering policy
- Open
- IRR as-set
AS-SERCZERNET- Present at
- 2 exchanges
- Website
- http://www.serczer.pl
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 2 valid, 0 with no ROA
- ROAs
- 2 authorising AS197480
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 3 naming AS197480
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: 445 networks and 1,817 prefixes, as published 2026-10-27. 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