Autonomous system
AS51399 PL-FIBERWAY-AS
Residential RIPE
Summary
Fiberway
residential isp fiber regional
PL-FIBERWAY-AS is operated by Fiberway Sp. z o.o.
What it's used for
- The address space carries residential and business customer traffic, evidenced by reverse DNS entries such as
host-91-103-145-0.fiberway.plandcgn-14-254.fiberway.pl, and the netnamePL-FIBERWAY-CUSTOMERS. - The AS announces 4864 IPv4 addresses across 6 prefixes and 1 IPv6 prefix, while maintaining 14 observed neighbours; this ratio of address space to peering partners indicates an access network providing last-mile connectivity.
- Traffic from this AS consists of subscriber eyeballs and web/API endpoints for Fiberway's regional broadband customers in Poland.
Notable
- All registrants for the announced prefixes are consistent with the announcer, listing Fiberway Sp. z o.o. for netnames including
PL-FIBERWAY2-20180622,PL-FIBERWAY-20100811, andPL-FIBERWAY-CUSTOMERS. - The inventory is composed of multiple /22 and smaller blocks, including a /24 (
110.172.146.0/24) and a /23 (91.217.0.0/23), reflecting a segmented allocation for different customer segments or acquisition periods.
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 |
|---|---|---|
| Equinix Internet Exchange Warsaw | Warsaw, Poland | 195.182.218.192 |
Transit providers
7 upstream, 0 downstream and 12 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 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 6 prefixes · 4.86K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 7 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS51399- Registry name
- PL-FIBERWAY-AS
- Registrant
- MNT-FIBERWAY
- Abuse contact
- abuse@fiberway.pl
- Registered
- 2010-08-13
- Last changed
- 2022-03-09
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 7 valid, 0 with no ROA
- ROAs
- 8 authorising AS51399
- ASPA
- no ASPA record
- IRR
- 100% registered · 7 of 7 announcements
- Route objects
- 12 naming AS51399
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 1,773 prefixes, as published 2026-10-13. 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