asn.dev

Autonomous system

AS58305 SYN-US SYN

Unclassified RIPE

IPv4 addresses 2.05K 4 prefixes
IPv6 prefixes 13 counted as prefixes, not addresses
Countries 1 mostly GB
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

SYN

United Kingdom · AI-generated

hosting infrastructure business

The AS handle SYN-US is held by SYN LTD.

What it's used for

  • The address space carries hosting and infrastructure services, evidenced by netnames such as UK-SYN-20131223 and SYN-US-NYCM, and reverse DNS entries like static.126.173.161.107.iniz.net.
  • The network announces 2048 IPv4 addresses across 4 prefixes and 13 IPv6 prefixes, with a single observed neighbour, indicating a focused infrastructure or hosting role rather than broad transit.
  • Traffic from this AS consists of web hosting, VPS, IP leasing, and DDoS protection services for business clients, as SYN provides global hosting and network infrastructure.

Notable

  • Registrants for all announced prefixes are consistently listed as SYN LTD, matching the AS holder.
  • SYN is a UK-based technology company providing hosting and network services to businesses worldwide, including custom hosting solutions, IP leasing, and DDoS protection.
  • The address inventory includes both UK-based blocks (UK-SYN-20131223) and US-based blocks (SYN-US-NYCM, SYN-7022-NYCM), reflecting a global infrastructure footprint.

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

Full topology · Graph

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS23470ReliableSite.Net LLC951

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

Shape and geography

IPv4 4 prefixes · 2.05K addresses IPv6 13 prefixes

CountryNamePrefixes
GBUnited Kingdom17

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS58305
Registry name
SYN-US
Registrant
MNT-SYN
Abuse contact
abuse@syn.one
Registered
2015-01-13
Last changed
2025-04-14
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 21 valid, 0 with no ROA
ROAs
15 authorising AS58305
ASPA
no ASPA record
IRR
52% registered · 11 of 21 announcements 10 other origin
Route objects
21 naming AS58305

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: 436 networks and 1,771 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

Cross-check