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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 1801 to 1850 of 2663
PrefixAddressesRegistryCountryAllocated
2a05:76c0::/2934.4B × /64RIPE NCCGB2nd Dec 2014
2a05:7940::/2934.4B × /64RIPE NCCGB4th Dec 2014
2a05:7b80::/2934.4B × /64RIPE NCCGB8th Dec 2014
2a05:7bc0::/2934.4B × /64RIPE NCCGB8th Dec 2014
2a05:7c80::/2934.4B × /64RIPE NCCGB9th Dec 2014
2a05:7d00::/2934.4B × /64RIPE NCCGB9th Dec 2014
2a05:8080::/2934.4B × /64RIPE NCCGB10th Dec 2014
2a05:80c0::/2934.4B × /64RIPE NCCGB10th Dec 2014
2a05:8d00::/2934.4B × /64RIPE NCCGB23rd Dec 2014
2a05:940::/2934.4B × /64RIPE NCCGB8th Aug 2014
2a05:9880::/2934.4B × /64RIPE NCCGB7th Jan 2015
2a05:9d00::/2934.4B × /64RIPE NCCGB9th Jan 2015
2a05:a0c0::/2934.4B × /64RIPE NCCGB13th Jan 2015
2a05:a180::/2934.4B × /64RIPE NCCGB14th Jan 2015
2a05:a340::/2934.4B × /64RIPE NCCGB15th Jan 2015
2a05:ab00::/2934.4B × /64RIPE NCCGB22nd Jan 2015
2a05:ac00::/2934.4B × /64RIPE NCCGB23rd Jan 2015
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
2a06:2840::/2934.4B × /64RIPE NCCGB17th Apr 2023
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