Department Noc

Data as of 2026-09-06
BGP inherited
This organisation
Netblocks24 · 65,628 IPv4 addresses
IPv6 13 prefixes (largest 2a00:2381:178c::/48)
Registered in United Kingdom (6) · France (4) · Canada (1)
Record ID236219363
RegistryBGP
Customerssee who runs inside this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 7 shared RIR contact/maintainer handles
Registry names 6 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (24)

⬇ export CSV
CIDR Org name Registry Status Confidence
51.89.246.224/30 Department Accounts RIPE LEGACY ● high
142.92.0.0/16 Department of Communications BGP ANNOUNCED ● high
51.254.148.200/29 Department Noc RIPE LEGACY ● low
51.254.164.232/29 Department Noc RIPE LEGACY ● low
51.255.133.56/29 Department Noc RIPE LEGACY ● low
62.6.63.120/29 DEPARTMENT-FOR RIPE ASSIGNED PA ● low
62.6.209.112/29 DEPARTMENT-FOR-INTERNATIONAL RIPE ASSIGNED PA ● low
195.99.246.48/28 DEPARTMENT-FOR RIPE ASSIGNED PA ● low
217.32.216.184/29 DEPARTMENT-OF RIPE ASSIGNED PA ● low
217.38.47.136/29 DEPARTMENT-FOR RIPE ASSIGNED PA ● low
217.38.175.48/28 DEPARTMENT-FOR RIPE ASSIGNED PA ● low
2a00:2381:178c::/48 DEPARTMENT-FOR RIPE AGGREGATED-BY-LIR ● low
2a00:2381:1e99::/48 DEPARTMENT-OF RIPE AGGREGATED-BY-LIR ● low
2a00:2381:2324::/48 DEPARTMENT-FOR RIPE AGGREGATED-BY-LIR ● low
2a00:2381:2324::/56 DEPARTMENT-FOR RIPE ASSIGNED ● low
2a00:2381:2324:100::/56 DEPARTMENT-FOR-INTERNATIONAL RIPE ASSIGNED ● low
2a00:2381:2739::/48 DEPARTMENT-OF RIPE AGGREGATED-BY-LIR ● low
2a00:2381:c062::/56 DEPARTMENT-FOR RIPE ASSIGNED ● low
2a00:2381:c062::/48 DEPARTMENT-FOR RIPE AGGREGATED-BY-LIR ● low
2a00:2381:c347::/48 DEPARTMENT-FOR RIPE AGGREGATED-BY-LIR ● low
2a00:2381:c7e7::/48 DEPARTMENT-FOR RIPE AGGREGATED-BY-LIR ● low
2a00:2381:c7e7::/56 DEPARTMENT-FOR RIPE ASSIGNED ● low
2a00:2381:e654::/48 DEPARTMENT-OF RIPE AGGREGATED-BY-LIR ● low
2a00:2381:ff6d:e00::/56 DEPARTMENT-OF RIPE ASSIGNED ● low

IPv6 ranges (13)

CIDR
2a00:2381:178c::/48
2a00:2381:1e99::/48
2a00:2381:2324::/48
2a00:2381:2739::/48
2a00:2381:c062::/48
2a00:2381:c347::/48
2a00:2381:c7e7::/48
2a00:2381:e654::/48
2a00:2381:2324:100::/56
2a00:2381:2324::/56
2a00:2381:c062::/56
2a00:2381:c7e7::/56
2a00:2381:ff6d:e00::/56

Footprint over time

11 weekly snapshots · JSON
24 -4 netblocks since 2026-07-05
2026-07-05 peak 28 2026-09-06

Network trust

what's this?
RPKI hygiene: A how networks compare →
95.8% of checked blocks have valid RPKI ROA coverage (23 of 24)
Possible discrepancies (13)

These blocks are registered to Department Noc 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.

2a00:2381:178c::/48 /48 authorized for AS2856 — British Telecommunications Limited
2a00:2381:1e99::/48 /48 authorized for AS2856 — British Telecommunications Limited
2a00:2381:e654::/48 /48 authorized for AS2856 — British Telecommunications Limited
2a00:2381:2324::/48 /48 authorized for AS2856 — British Telecommunications Limited
2a00:2381:2739::/48 /48 authorized for AS2856 — British Telecommunications Limited
2a00:2381:c062::/48 /48 authorized for AS2856 — British Telecommunications Limited
2a00:2381:c347::/48 /48 authorized for AS2856 — British Telecommunications Limited
2a00:2381:c7e7::/48 /48 authorized for AS2856 — British Telecommunications Limited
2a00:2381:ff6d:e00::/56 /56 authorized for AS2856 — British Telecommunications Limited
2a00:2381:2324::/56 /56 authorized for AS2856 — British Telecommunications Limited
2a00:2381:2324:100::/56 /56 authorized for AS2856 — British Telecommunications Limited
2a00:2381:c062::/56 /56 authorized for AS2856 — British Telecommunications Limited
2a00:2381:c7e7::/56 /56 authorized for AS2856 — British Telecommunications Limited

NIC Handles

AS818 BTNET-MNT DUMY-RIPE DUMY-RIPE ORG-DA1410-RIPE ORG-DN556-RIPE OVH-MNT