asn.dev

Autonomous system

AS45455 TH-2S1N-AP Two S One N Co Ltd, Internet Service Provider and IT Solutions

Unclassified APNIC

IPv4 addresses 3.07K 5 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly TH
Exchanges 0 recorded by PCH
Upstreams 3 0 downstream
Flagged prefixes 0 none

Summary

Two S One N Co Ltd

Thailand · AI-generated

isp business thailand

The AS handle TH-2S1N-AP is held by Two S One N Co Ltd, a Thai internet service provider and IT solutions firm.

What it's used for

  • The address space carries corporate and customer infrastructure, evidenced by reverse DNS entries like static-corp.jastel.co.th and netnames such as NET-2S1N-TH and CUST-ISP-JASTEL.
  • The AS announces 3072 IPv4 addresses across 5 prefixes while maintaining only 3 observed neighbours, a ratio indicative of an access or business network rather than a transit provider.
  • Traffic from this AS consists of business and corporate endpoints, including static corporate connections for JasTel Network and other IT solutions clients.

Notable

  • Registrants for the largest prefixes (45.112.140.0/22 and 103.51.224.0/22) align with the announcer, listing TWO S ONE N CoLtd and TWO S ONE N Co.,Ltd.
  • The inventory includes prefixes registered to JASTEL NETWORK (58.82.188.0/23, 58.82.187.0/24, 203.156.118.0/24), indicating a relationship or lease arrangement with JasTel Network Company Limited.
  • The address inventory is a mix of Two S One N's own space and JasTel Network space, with no IPv6 prefixes in the inventory.

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

3 upstream, 0 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS45629JasTel Network International Gateway704
AS45796UIH / BB Connect413
AS45642Jasmine International Tower11

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, 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 5 prefixes · 3.07K addresses IPv6 0 prefixes

CountryNamePrefixes
THThailand5

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS45455
Registry name
TH-2S1N-AP
Registrant
Two S One N Co Ltd
Abuse contact
thien@2s1n.com
Registered
2021-04-09
Last changed
2023-09-05
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 18 valid, 0 with no ROA
ROAs
7 authorising AS45455
ASPA
no ASPA record
IRR
100% registered · 18 of 18 announcements
Route objects
42 naming AS45455

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: 442 networks and 1,782 prefixes, as published 2026-10-16. 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