City of London — IP ranges & network footprint

Footprint over time

6 weekly snapshots · JSON

11 0 netblocks since 2026-07-05

2026-07-05 peak 11 2026-07-26

IP Ranges (11)

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CIDR	Org name	Registry	Status	Confidence
204.225.163.0/24	City of London	BGP	ANNOUNCED	● high
62.30.97.136/29	CITY-OF-LONDON-CORPORATION	RIPE	ASSIGNED PA	● low
62.255.27.20/30	CITY-OF-LONDON-CORPORATION	RIPE	ASSIGNED PA	● low
62.255.103.160/29	CITY-OF-LONDON-CORPORATION	RIPE	ASSIGNED PA	● low
81.134.202.240/28	CITY-OF-LONDON	RIPE	ASSIGNED PA	● low
194.168.100.32/28	CITY-OF-LONDON-CORPORATION	RIPE	ASSIGNED PA	● low
213.253.19.24/29	CITY-OF-LONDON	RIPE	ASSIGNED PA	● low
213.253.19.144/29	CITY-OF-LONDON	RIPE	ASSIGNED PA	● low
217.169.42.160/27	City-of-London-Corporation	RIPE	ASSIGNED PA	● low
2a00:2381:276b::/48	CITY-OF-LONDON	RIPE	AGGREGATED-BY-LIR	● low
2a00:2381:ca47::/48	CITY-OF-LONDON	RIPE	AGGREGATED-BY-LIR	● low

IPv6 ranges (2)

CIDR
2a00:2381:276b::/48
2a00:2381:ca47::/48

Possibly related to this organisation

what's this?

Same name family

Separately-registered clusters whose names share “City of London” — often per-country or per-system registrations of the same brand, occasionally a different organisation sharing the name. Not counted in this organisation's own footprint.

CITY-OF-LONDON-INVESTMENT 1 blocks
City_of_London_Academy_398535 1 blocks
CITY-OF-LONDON-INVESTMENTS-NET1-LON-UK 1 blocks
CITY-OF-LONDON-0708 1 blocks
CITY-OF-LONDON-0202 1 blocks
CITY-OF-LONDON-0302 1 blocks
CITY-OF-LONDON-CLUB 1 blocks

Sub-allocations under carriers

IP blocks an ISP reassigned to a similarly-named customer — decoded from the ISP's own naming convention, not a direct registration.

Pipex Londoncitybo via Wavenet Limited sub-allocation
City_of_London_Academy_398535 via Vodafone Limited sub-allocation
CITYPOSTLONDON via Vodafone Group PLC sub-allocation
EAST-LONDON-CITY-MENTAL-HEALTH-TRUST via Virgin Media Limited sub-allocation
City Of London Investment Management via Emirates Integrated Telecommunications Company PJSC sub-allocation
CITY-OF-LONDON-INVESTMENTS-NET1-LON-UK sub-allocation
CITY-OF-LONDON-0708 via Claranet Limited sub-allocation
CITY-OF-LONDON-0202 via Claranet Limited sub-allocation

Network trust

what's this?

RPKI hygiene: B how networks compare →

90.9% of checked blocks have valid RPKI ROA coverage (10 of 11)

Possible discrepancies (2)

These blocks are registered to City of London but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2a00:2381:276b::/48 /48	authorized for AS2856 — British Telecommunications Limited
2a00:2381:ca47::/48 /48	authorized for AS2856 — British Telecommunications Limited

NIC Handles

AS397264 AS5089-MNT AS8426-MNT BISUK-MNT BTNET-MNT DUMY-RIPE DUMY-RIPE

Netblocks	11 · 356 IPv4 addresses
IPv6	2 prefixes (largest 2a00:2381:276b::/48)
Registered in	United Kingdom (8) · Canada (1)
All fragments	18 blocks across 8 clusters
Cluster ID	213349025
Registry	BGP
Customers	find customers using this network →

Attribution	BGP parent (inherited)
Shared handles	clustered on 7 shared RIR contact/maintainer handles
Registry names	4 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue