AS21301
Natwest Markets PLC
Scanned 4h 44m ago
🔄 Rescan

📋 Summary

IP address summary information
NameNatwest Markets PLC
WebsiteEDINBURGH
IPv4 addresses4.4K
IPv6 addressesNot available
ASN typeTransit
RegistryRIPE NCC
AllocatedOct 24, 2001
UpdatedApr 10, 2026

📊 IP Ranges

IPv4: 12 | IPv6: 0
NetblockIP Count
155.136.200.0/24 256
155.136.56.0/22 1.0K
155.136.200.0/23 512
155.136.57.0/24 256
155.136.59.0/24 256
155.136.58.0/24 256
155.136.202.0/23 512
155.136.201.0/24 256
155.136.56.0/24 256
155.136.146.0/24 256
155.136.151.0/24 256
155.136.144.0/24 256

Prefix data from RIPE Stat / RIR allocation records.

📄 WHOIS

RIPE NCC
HandleAS21301
NameUK-NATWEST-AS21301
OrganizationNatwest Markets PLC
Statusactive
AllocatedOct 24, 2001
UpdatedApr 10, 2026

Contacts

RegistrantNatwest Markets PLC
Abuse ContactAbuse-C Role <abuse.cz@o2.com>
Admin ContactSean Jarvis
Tech ContactTechnical Role <ripe-abuse@rbs.com>
Phone+44 7972 792793
Address250 Bishopsgate London EC2M 3UR

Source: RIPE NCC

🔗 Peers

0 peers for this ASN

No peers found.

⬆️ Upstreams

3 upstreams
ASNName
AS1273 IDDQD-AS
AS2856 BT-UK-AS British Telecommunications Limited
AS32787 Akamai Technologies, Inc.

Upstream data from RIPE Stat routing history.

⬇️ Downstreams

0 downstreams

No downstreams found.

🔒 RPKI / ROA

Source: rpki.zorn.ltd
PrefixOrigin ASNMax LengthValidity
155.136.200.0/24 AS21301 /24 Not Found
155.136.56.0/22 AS21301 /22 Not Found
155.136.200.0/23 AS21301 /23 Not Found
155.136.57.0/24 AS21301 /24 Not Found
155.136.59.0/24 AS21301 /24 Not Found
155.136.58.0/24 AS21301 /24 Not Found
155.136.202.0/23 AS21301 /23 Not Found
155.136.201.0/24 AS21301 /24 Not Found
155.136.56.0/24 AS21301 /24 Not Found
155.136.146.0/24 AS21301 /24 Not Found
155.136.151.0/24 AS21301 /24 Not Found
155.136.144.0/24 AS21301 /24 Not Found

RPKI validation powered by rpki.zorn.ltd (Routinator).

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