asn.dev

Autonomous system

AS18256 BAY-AS-AP Bank of Ayudhya Public Company Limited.

Unclassified APNIC

IPv4 addresses 1.79K 6 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

Bank of Ayudhya

Thailand · AI-generated

business finance corporate

BAY-AS-AP is operated by Bank of Ayudhya Public Company Limited.

What it's used for

  • The address space carries corporate infrastructure for a major Thai financial institution, with netnames BAY-TH associated with the bank's administrative and IRT contacts.
  • The AS announces 1792 IPv4 addresses across 6 prefixes in Thailand, while maintaining only 3 observed routing neighbours, indicating a small, self-contained internal network rather than a transit or access provider.

Notable

  • Registrants for the largest prefixes (103.216.96.0/23 and 103.219.196.0/24) align with the announcer, identifying Bank of Ayudhya Public Company Limited as the holder.
  • Other announced prefixes are registered to third parties, including Advanced Wireless Network Company Limited (netname AWN-CO-LTD-TH) and Symphony Communication Public Company Limited (netname SYMPHONY-INTERNET-DIA), suggesting leased or historically allocated space.
  • The inventory consists of six distinct IPv4 prefixes with no IPv6 announcements, reflecting a segmented 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

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
AS19551Incapsula Inc238
AS45458SBN-ISP/AWN-ISP and SBN-NIX/AWN-NIX125
AS7470TRUE INTERNET Co.,Ltd.60

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, 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 6 prefixes · 1.79K addresses IPv6 0 prefixes

CountryNamePrefixes
THThailand6

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS18256
Registry name
BAY-AS-AP
Registrant
Bank of Ayudhya Public Company Limited.
Abuse contact
watjarkon.butrarat@krungsri.com
Registered
2008-09-04
Last changed
2020-05-20
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
43% valid · 3 valid, 4 with no ROA
ROAs
3 authorising AS18256
ASPA
no ASPA record
IRR
100% registered · 7 of 7 announcements
Route objects
12 naming AS18256

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: 447 networks and 1,845 prefixes, as published 2026-10-31. 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