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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 1201 to 1250 of 2663
PrefixAddressesRegistryCountryAllocated
2001:67c:12dc::/4865.5k × /64RIPE NCCGB5th Oct 2012
2001:67c:130c::/4865.5k × /64RIPE NCCGB24th Jan 2013
2001:67c:1360::/4865.5k × /64RIPE NCCGB18th Feb 2013
2001:67c:1368::/4865.5k × /64RIPE NCCGB2nd Oct 2025
2001:67c:1510::/4865.5k × /64RIPE NCCGB19th Mar 2013
2001:67c:1538::/4865.5k × /64RIPE NCCGB27th Mar 2013
2001:67c:172c::/4865.5k × /64RIPE NCCGB3rd May 2013
2001:67c:17e0::/4865.5k × /64RIPE NCCGB16th Aug 2024
2001:67c:185c::/4865.5k × /64RIPE NCCGB10th Aug 2021
2001:67c:1884::/4865.5k × /64RIPE NCCGB24th Oct 2013
2001:67c:188::/4865.5k × /64RIPE NCCGB5th Mar 2010
2001:67c:18e4::/4865.5k × /64RIPE NCCGB20th Nov 2013
2001:67c:1940::/4865.5k × /64RIPE NCCGB16th Dec 2013
2001:67c:1b4c::/4865.5k × /64RIPE NCCGB31st Jul 2026
2001:67c:1c4::/4865.5k × /64RIPE NCCGB6th Apr 2010
2001:67c:1dc::/4865.5k × /64RIPE NCCGB16th Apr 2010
2001:67c:20b4::/4865.5k × /64RIPE NCCGB16th Feb 2011
2001:67c:20e8::/4865.5k × /64RIPE NCCGB21st Feb 2011
2001:67c:2298::/4865.5k × /64RIPE NCCGB19th May 2011
2001:67c:22c::/4865.5k × /64RIPE NCCGB4th Jun 2010
2001:67c:2450::/4865.5k × /64RIPE NCCGB4th Jul 2025
2001:67c:2630::/4865.5k × /64RIPE NCCGB10th Jan 2012
2001:67c:26b8::/4865.5k × /64RIPE NCCGB9th Feb 2012
2001:67c:26ec::/4865.5k × /64RIPE NCCGB15th Feb 2012
2001:67c:2790::/4865.5k × /64RIPE NCCGB20th Mar 2012
2001:67c:2958::/4865.5k × /64RIPE NCCGB19th Feb 2021
2001:67c:2cd0::/4865.5k × /64RIPE NCCGB5th Dec 2014
2001:67c:2d3c::/4865.5k × /64RIPE NCCGB5th Jan 2015
2001:67c:2d84::/4865.5k × /64RIPE NCCGB20th Jan 2015
2001:67c:2e24::/4865.5k × /64RIPE NCCGB2nd Mar 2015
2001:67c:2e84::/4865.5k × /64RIPE NCCGB30th Sept 2015
2001:67c:2e88::/4865.5k × /64RIPE NCCGB30th Sept 2015
2001:67c:33c::/4865.5k × /64RIPE NCCGB4th Nov 2010
2001:67c:3d8::/4865.5k × /64RIPE NCCGB11th Jan 2011
2001:67c:3e4::/4865.5k × /64RIPE NCCGB25th Jul 2012
2001:67c:3f0::/4865.5k × /64RIPE NCCGB26th Jul 2012
2001:67c:42c::/4865.5k × /64RIPE NCCGB12th Feb 2014
2001:67c:580::/4865.5k × /64RIPE NCCGB6th May 2014
2001:67c:694::/4865.5k × /64RIPE NCCGB17th Jul 2014
2001:67c:6a8::/4865.5k × /64RIPE NCCGB24th Jul 2014
2001:67c:72c::/4865.5k × /64RIPE NCCGB18th Sept 2014
2001:67c:788::/4865.5k × /64RIPE NCCGB3rd Oct 2014
2001:67c:80::/4865.5k × /64RIPE NCCGB1st Apr 2015
2001:67c:90::/4865.5k × /64RIPE NCCGB28th Oct 2009
2001:67c:93c::/4865.5k × /64RIPE NCCGB12th Mar 2024
2001:67c:a24::/4865.5k × /64RIPE NCCGB27th Jun 2022
2001:67c:b6c::/4865.5k × /64RIPE NCCGB10th Feb 2025
2001:67c:d90::/4865.5k × /64RIPE NCCGB10th Jan 2024
2001:67c:e24::/4865.5k × /64RIPE NCCGB1st Mar 2024
2001:67c:f0::/4865.5k × /64RIPE NCCGB30th Jun 2026