Autonomous system
AS51864 FOURSYNC-AS 4Sync Solutions sp. z o.o. s. k.-a.
Unclassified RIPE
Summary
4Sync Solutions
business poland vpn
The AS handle FOURSYNC-AS is held by 4Sync Solutions sp. z o.o. s. k.-a.
What it's used for
- The address space carries the netname
SurfSafe, indicating usage for secure connectivity or VPN services. - The network announces 2048 IPv4 addresses within a single prefix (178.213.96.0/21) and maintains 1 observed neighbour, a ratio consistent with a dedicated business or service endpoint rather than a transit or access provider.
- Traffic from this AS consists of corporate or service endpoints associated with 4Sync Solutions' secure network offerings.
Notable
- The RDAP registrant
4Sync Solutions sp. z o.o. s. k.-a.matches the registry holder and the AS name. - The address inventory consists of a single contiguous /21 block, representing a compact and unified corporate estate.
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
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS9085 | SUPERMEDIA Sp.z.o.o. | 65 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-05, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 2.05K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PL | Poland | 1 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS51864- Registry name
- FOURSYNC-AS
- Registrant
- 4Sync Solutions sp. z o.o. s. k.-a.
- Abuse contact
- abuse@etop.pl
- Registered
- 2010-11-18
- Last changed
- 2020-05-06
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS51864
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS51864
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: 453 networks and 1,854 prefixes, as published 2026-11-06. 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