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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

2,628 blocks match, ordered by prefix.

Allocated but unannounced blocks, 1801 to 1850 of 2628
PrefixAddressesRegistryCountryAllocated
2a05:b140::/3017.2B × /64RIPE NCCGB18th Oct 2019
2a05:b280::/2934.4B × /64RIPE NCCGB28th Jan 2015
2a05:bbc0::/2934.4B × /64RIPE NCCGB4th Sept 2018
2a05:bf40::/2934.4B × /64RIPE NCCGB5th Oct 2015
2a05:c480::/2934.4B × /64RIPE NCCGB11th Feb 2015
2a05:c540::/2934.4B × /64RIPE NCCGB12th Feb 2015
2a05:c780::/2934.4B × /64RIPE NCCGB19th Jun 2018
2a05:c980::/2934.4B × /64RIPE NCCGB16th Feb 2015
2a05:cb00::/2934.4B × /64RIPE NCCGB17th Feb 2015
2a05:db40::/2934.4B × /64RIPE NCCGB27th Feb 2015
2a05:de40::/2934.4B × /64RIPE NCCGB3rd Mar 2015
2a05:ea80::/2934.4B × /64RIPE NCCGB12th Mar 2015
2a05:ecc0::/2934.4B × /64RIPE NCCGB13th Mar 2015
2a05:f580::/2934.4B × /64RIPE NCCGB23rd Mar 2015
2a06:140::/2934.4B × /64RIPE NCCGB20th Apr 2015
2a06:1ac0::/2934.4B × /64RIPE NCCGB20th May 2015
2a06:1bc0::/2934.4B × /64RIPE NCCGB21st May 2015
2a06:1d40::/2934.4B × /64RIPE NCCGB22nd May 2015
2a06:2100::/3017.2B × /64RIPE NCCGB18th Oct 2019
2a06:2440::/2934.4B × /64RIPE NCCGB22nd Jun 2018
2a06:27c0::/2934.4B × /64RIPE NCCGB2nd Jun 2015
2a06:2a40::/2934.4B × /64RIPE NCCGB5th Jun 2015
2a06:2e80::/2934.4B × /64RIPE NCCGB22nd Jun 2018
2a06:3400::/2934.4B × /64RIPE NCCGB6th Oct 2015
2a06:3540::/2934.4B × /64RIPE NCCGB18th Jun 2015
2a06:3780::/2934.4B × /64RIPE NCCGB19th Jun 2015
2a06:3800::/2934.4B × /64RIPE NCCGB3rd Jun 2025
2a06:3a00::/2934.4B × /64RIPE NCCGB15th Jun 2020
2a06:3f00::/2934.4B × /64RIPE NCCGB30th Jun 2015
2a06:4780::/2934.4B × /64RIPE NCCGB26th Jun 2018
2a06:47c0::/2934.4B × /64RIPE NCCGB2nd Jul 2026
2a06:4bc0::/2934.4B × /64RIPE NCCGB10th Jul 2015
2a06:4cc0::/2934.4B × /64RIPE NCCGB13th Jul 2015
2a06:4f80::/2934.4B × /64RIPE NCCGB15th Jul 2015
2a06:6340::/324.3B × /64RIPE NCCGB17th May 2021
2a06:6600::/2934.4B × /64RIPE NCCGB11th Aug 2015
2a06:6b80::/2934.4B × /64RIPE NCCGB19th Aug 2015
2a06:6d00::/2934.4B × /64RIPE NCCGB21st Aug 2015
2a06:740::/2934.4B × /64RIPE NCCGB16th May 2025
2a06:79c0::/2934.4B × /64RIPE NCCGB4th Sept 2015
2a06:8200::/2934.4B × /64RIPE NCCGB22nd Apr 2026
2a06:840::/2934.4B × /64RIPE NCCGB1st Jul 2026
2a06:8980::/2934.4B × /64RIPE NCCGB29th Sept 2015
2a06:8b40::/2934.4B × /64RIPE NCCGB1st Oct 2015
2a06:8d80::/2934.4B × /64RIPE NCCGB5th Oct 2015
2a06:8f40::/2934.4B × /64RIPE NCCGB20th May 2026
2a06:9540::/2934.4B × /64RIPE NCCGB24th Sept 2015
2a06:9a80::/2934.4B × /64RIPE NCCGB8th Oct 2015
2a06:9c00::/2934.4B × /64RIPE NCCGB9th Oct 2015
2a06:9d00::/2934.4B × /64RIPE NCCGB13th Oct 2015