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United Kingdom (GB)RPKI 78%

Ranked #4 worldwide by IPv4 address space.

IPv4 held

139.3M

8.3 × /8

IPv6 held

1.4B

/48 blocks

AS numbers

3,125

allocated

World rank

by IPv4

Deep profile

How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.

All rankings →

Dark IPv4

#2 of 241

Allocated but unrouted

Net seller

−519.9K

Net seller · #16 of 241

RPKI rank

#11 of 49

By IPv4 ROA coverage

Per-capita rank

#12 of 241

2.01 IPs / person

IPv6 adoption

APNIC-measured end-user deployment.

Capable53.8%

Preferred53.1%

Routing hygiene

Clean prefixes (valid RPKI + IRR, no mismatch).

74/100

8,325 clean of 31,853 prefixes

63 RPKI-invalid

Resource history

Cumulative IPv4, IPv6, and ASN allocations to United Kingdom over time.

Top 10 local networks

The largest autonomous systems registered to United Kingdom by IPv4 footprint.

All networks →

AS	Holder	IPv4	Prefixes
AS5089GB	NTL Virgin Media Limited	22.9M	299
AS2856GB	BT-UK-AS British Telecommunications PLC	18.4M	488
AS13285GB	OPALTELECOM-AS TalkTalk Communications Limited	8.4M	96
AS5607GB	BSKYB-BROADBAND-AS Sky UK Limited	7.1M	81
AS786GB	JANET - Jisc Services Limited	7M	219

Compare with neighbors

United Kingdom against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.

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IE Ireland

Routing security (RPKI)

Share of announced address space covered by valid Route Origin Authorizations.

ipv4RPKI 78%

16,492 valid43 invalid9,406 not found75.1M / 95.7M addrs

ipv6RPKI 81%

2,884 valid20 invalid3,008 not found289.2M / 355.3M addrs

Networks in this country

3,123 autonomous systems registered to United Kingdom. Click an AS for detail.

AS	Holder	IPv4 ↓	IPv6 /48	Prefixes
AS57099GB	QUICKLINE Quickline Communications Limited	31.2K	—	15
AS39537GB	HNS SysGroup plc	30.5K	69.6K	26
AS199335GB	TALKSTRAIGHT Talk Straight Ltd.	30.5K	65.5K	23
AS51809GB	BRSK BRSK Limited