AS21301 UK-NATWEST-AS21301 Natwest Markets PLC

🇬🇧

Org handle: ORG-TRBo1-RIPE

EDINBURGH

RIPE NCCallocated

Announced Prefixes (BGP)

15total

15 IPv40 IPv6

IPv4 Addresses

Allocated (RIR)0

Announced (BGP)135,424

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)0

Prefix Limit (IPv4)

Prefix Limit (IPv6)

Country

RIR

Status

allocated

Allocated

2001-10-24

Announced Prefixes

(BGP)15

Prefix	RPKI	IRR	Last Seen
155.136.0.0/16MOAS	No ROA	Other IRRRIPE	2026-10-11
155.136.0.0/17MOAS	No ROA	-	2026-10-11
155.136.56.0/22	No ROA	RIPE	2026-10-11
155.136.56.0/24	No ROA	Other IRR	2026-10-11
155.136.57.0/24	No ROA	Other IRR	2026-10-11
155.136.58.0/24	No ROA	Other IRR	2026-10-11
155.136.59.0/24	No ROA	Other IRR	2026-10-11
155.136.128.0/17MOAS	No ROA	-	2026-10-11
155.136.144.0/24MOAS	No ROA	Other IRRRIPE	2026-10-11
155.136.146.0/24MOAS	No ROA	Other IRRRIPE	2026-10-11

1-10 of 15

1 / 2

(seen in AS paths)

Networks AS21301 hands its own prefixes to: transit providers, or peers at an exchange.

ASPA

No ASPA

Abuse Contact

External Links

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS21301 should publish an ASPA object
IPv4 transfers in the RIPE NCC regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/21301" | jq