IAN WILLIAMS LTD

IAN-WILLIAMS-LTD
Data as of 2026-09-06
Registry
This organisation
Netblocks44
IPv6 1 prefix (largest 2a00:2381:3aa8::/48)
Also registered under this name 49 netblocks across 6 separate records
Record ID236528493
RegistryRIPE
Customerssee who runs inside this network →
Evidence & provenance ?
Attribution Registry record
Shared handles clustered on 5 shared RIR contact/maintainer handles
Registry names 3 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (44)

⬇ export CSV
CIDR Org name Registry Status Confidence
80.168.27.40/29 IAN-WILLIAMS-LIMITED RIPE ASSIGNED PA ● low
81.2.106.110/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.2.118.224/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.2.126.44/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.27.40/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.148/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.150/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.151/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.224/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.225/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.226/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.227/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.228/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.229/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.230/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.231/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.35.239/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.40.96/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.41.76/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.8/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.12/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.20/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.24/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.32/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.40/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.49/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.50/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.51/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.52/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.56/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.60/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.43.73/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.46.212/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.46.216/29 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.168.244/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.168.252/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.177.32/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.177.40/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.202.156/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.229.180/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.239.89/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.247.91/32 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
81.187.255.164/30 IAN-WILLIAMS-LTD RIPE ASSIGNED PA ● low
2a00:2381:3aa8::/48 IAN-WILLIAMS RIPE AGGREGATED-BY-LIR ● low

IPv6 ranges (1)

CIDR
2a00:2381:3aa8::/48

Footprint over time

11 weekly snapshots · JSON
44 0 netblocks since 2026-07-05
2026-07-05 peak 44 2026-09-06

Network trust

what's this?
RPKI hygiene: A how networks compare →
100.0% of checked blocks have valid RPKI ROA coverage (44 of 44)
Possible discrepancies (1)

These blocks are registered to IAN-WILLIAMS-LTD 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.

2a00:2381:3aa8::/48 /48 authorized for AS2856 — British Telecommunications Limited

NIC Handles

AA AS8426-MNT BTNET-MNT DUMY-RIPE DUMY-RIPE