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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 2301 to 2350 of 2663
PrefixAddressesRegistryCountryAllocated
2a14:3b80::/2934.4B × /64RIPE NCCGB23rd Jun 2026
2a14:3c0::/2934.4B × /64RIPE NCCGB14th Feb 2024
2a14:3d80::/2934.4B × /64RIPE NCCGB23rd Jun 2026
2a14:4180::/2934.4B × /64RIPE NCCGB18th Dec 2023
2a14:4dc0::/324.3B × /64RIPE NCCGB15th May 2024
2a14:4f00::/2934.4B × /64RIPE NCCGB16th Nov 2023
2a14:6cc0::/2934.4B × /64RIPE NCCGB18th Jun 2024
2a14:7140::/2934.4B × /64RIPE NCCGB26th Jun 2024
2a14:75c0::/2934.4B × /64RIPE NCCGB3rd Jul 2024
2a14:8580::/2934.4B × /64RIPE NCCGB14th Feb 2025
2a14:8c0::/2934.4B × /64RIPE NCCGB20th Feb 2024
2a14:a500::/2934.4B × /64RIPE NCCGB8th Jan 2025
2a14:bd80::/324.3B × /64RIPE NCCGB13th Mar 2025
2a14:c280::/324.3B × /64RIPE NCCGB17th Mar 2025
2a14:cd80::/2934.4B × /64RIPE NCCGB24th Mar 2025
2a14:ce00::/324.3B × /64RIPE NCCGB20th Dec 2024
2a14:e280::/2934.4B × /64RIPE NCCGB9th Oct 2025
31.14.102.0/24256RIPE NCCGB18th Apr 2011
31.207.40.0/221kRIPE NCCGB2nd May 2011
31.220.244.0/24256RIPE NCCGB12th May 2011
31.28.66.0/24256RIPE NCCGB23rd Feb 2011
31.28.74.0/24256RIPE NCCGB23rd Feb 2011
31.71.0.0/1665.5kRIPE NCCGB25th Nov 2010
31.72.0.0/14262kRIPE NCCGB25th Nov 2010
31.78.0.0/15131kRIPE NCCGB25th Nov 2010
31.99.153.0/24256RIPE NCCGB25th Nov 2010
31.99.154.0/23512RIPE NCCGB25th Nov 2010
31.99.156.0/221kRIPE NCCGB25th Nov 2010
31.99.160.0/198.2kRIPE NCCGB25th Nov 2010
31.99.208.0/204.1kRIPE NCCGB25th Nov 2010
31.99.224.0/198.2kRIPE NCCGB25th Nov 2010
31.99.64.0/1816.4kRIPE NCCGB25th Nov 2010
36.255.148.0/221kRIPE NCCGB19th Feb 2016
37.122.192.0/212kRIPE NCCGB14th Feb 2012
37.203.179.0/24256RIPE NCCGB26th Mar 2012
37.75.232.0/212kRIPE NCCGB31st Jan 2012
40.17.0.0/1665.5kRIPE NCCGB23rd Apr 1991
40.21.0.0/1665.5kRIPE NCCGB23rd Apr 1991
40.25.0.0/1665.5kRIPE NCCGB23rd Apr 1991
45.10.76.0/221kRIPE NCCGB24th Apr 2019
45.12.188.0/221kRIPE NCCGB2nd May 2019
45.12.20.0/221kRIPE NCCGB30th Apr 2019
45.132.228.0/221kRIPE NCCGB24th Jul 2019
45.133.240.0/24256RIPE NCCGB20th Mar 2023
45.139.80.0/221kRIPE NCCGB8th Aug 2019
45.14.168.0/221kRIPE NCCGB9th May 2019
45.142.12.0/24256RIPE NCCGB4th Jun 2021
45.144.144.0/221kRIPE NCCGB22nd Aug 2019
45.146.144.0/221kRIPE NCCGB28th Aug 2019
45.146.72.0/221kRIPE NCCGB28th Aug 2019