subnet.im

Allocated but unannounced space

Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.

“Unannounced” does not mean “unused”

Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.

It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.

Browse by registry

Browse by country

Countries with the most unannounced blocks, largest first.

Unannounced blocks in United Kingdom

2,663 blocks match, ordered by prefix.

Allocated but unannounced blocks, 751 to 800 of 2663
PrefixAddressesRegistryCountryAllocated
193.176.60.0/24256RIPE NCCGB23rd Feb 1993
193.177.136.0/221kRIPE NCCGB11th Oct 1993
193.178.116.0/24256RIPE NCCGB21st Apr 1995
193.178.238.0/23512RIPE NCCGB19th Mar 2001
193.188.132.0/23512RIPE NCCGB16th Jun 1997
193.189.140.0/24256RIPE NCCGB3rd May 2005
193.19.156.0/221kRIPE NCCGB5th Dec 2003
193.192.12.64/2664RIPE NCCGB18th Nov 2024
193.192.13.0/24256RIPE NCCGB15th Nov 1999
193.192.16.0/204.1kRIPE NCCGB6th Jun 1996
193.192.34.0/23512RIPE NCCGB4th Aug 2005
193.193.188.0/23512RIPE NCCGB27th Apr 2000
193.193.32.0/198.2kRIPE NCCGB22nd May 1996
193.194.22.0/23512RIPE NCCGB29th Apr 1997
193.194.24.0/212kRIPE NCCGB29th Apr 1997
193.200.166.0/24256RIPE NCCGB10th May 2007
193.200.192.0/24256RIPE NCCGB25th Mar 2020
193.200.245.0/24256RIPE NCCGB12th Jun 2007
193.200.25.0/24256RIPE NCCGB22nd Jan 2007
193.201.140.0/221kRIPE NCCGB11th Jul 2002
193.201.149.128/2664RIPE NCCGB25th Feb 2026
193.201.151.128/2664RIPE NCCGB1st Feb 2024
193.201.154.0/25128RIPE NCCGB4th Dec 2003
193.201.160.0/24256RIPE NCCGB1st Jul 2002
193.201.174.0/24256RIPE NCCGB18th Jul 2002
193.201.197.0/24256RIPE NCCGB27th May 2026
193.201.92.0/221kRIPE NCCGB25th Jun 2002
193.202.1.0/24256RIPE NCCGB7th Apr 1993
193.202.105.0/24256RIPE NCCGB13th Jan 2009
193.202.2.0/23512RIPE NCCGB7th Apr 1993
193.202.224.0/204.1kRIPE NCCGB13th Jul 1993
193.202.4.0/221kRIPE NCCGB7th Apr 1993
193.202.62.0/23512RIPE NCCGB22nd Nov 1993
193.203.192.0/23512RIPE NCCGB31st Oct 2005
193.203.255.0/24256RIPE NCCGB8th Feb 2000
193.219.101.0/24256RIPE NCCGB19th Nov 2019
193.219.108.0/24256RIPE NCCGB27th Sept 2006
193.22.1.0/24256RIPE NCCGB13th Nov 2019
193.22.106.0/24256RIPE NCCGB13th Nov 2019
193.22.243.0/24256RIPE NCCGB25th Nov 2003
193.22.80.0/24256RIPE NCCGB13th Nov 2019
193.22.86.0/24256RIPE NCCGB13th Nov 2019
193.221.84.0/23512RIPE NCCGB20th Dec 1993
193.222.108.0/24256RIPE NCCGB14th Jun 2023
193.227.106.0/24256RIPE NCCGB31st Aug 2006
193.227.118.0/24256RIPE NCCGB5th Sept 2006
193.227.200.0/23512RIPE NCCGB28th Jan 2000
193.227.246.0/23512RIPE NCCGB12th Oct 2005
193.228.141.0/24256RIPE NCCGB10th Jul 2007
193.239.112.0/221kRIPE NCCGB4th Jul 2005