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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 1951 to 2000 of 2663
PrefixAddressesRegistryCountryAllocated
2a09:bd40::/2934.4B × /64RIPE NCCGB13th Mar 2019
2a09:c640::/2934.4B × /64RIPE NCCGB14th Mar 2019
2a09:c680::/2934.4B × /64RIPE NCCGB19th Dec 2018
2a09:c8c0::/2934.4B × /64RIPE NCCGB15th Mar 2019
2a09:d3c0::/2934.4B × /64RIPE NCCGB18th Mar 2019
2a09:dcc0::/2934.4B × /64RIPE NCCGB20th Mar 2019
2a09:e4c0::/324.3B × /64RIPE NCCGB21st Mar 2019
2a09:ec0::/2934.4B × /64RIPE NCCGB19th Jun 2026
2a09:edc0::/324.3B × /64RIPE NCCGB25th Mar 2019
2a0a:1d80::/2934.4B × /64RIPE NCCGB8th Nov 2016
2a0a:26c0::/2934.4B × /64RIPE NCCGB28th Feb 2017
2a0a:2700::/2934.4B × /64RIPE NCCGB13th Jan 2020
2a0a:2e40::/2934.4B × /64RIPE NCCGB2nd Mar 2017
2a0a:3800::/2934.4B × /64RIPE NCCGB11th Aug 2016
2a0a:4040::/2934.4B × /64RIPE NCCGB10th Mar 2017
2a0a:5180::/2934.4B × /64RIPE NCCGB17th Nov 2016
2a0a:5300::/2934.4B × /64RIPE NCCGB26th Sept 2016
2a0a:5940::/2934.4B × /64RIPE NCCGB21st Mar 2017
2a0a:5a40::/2934.4B × /64RIPE NCCGB21st Mar 2017
2a0a:640::/2934.4B × /64RIPE NCCGB11th Jul 2025
2a0a:6600::/2934.4B × /64RIPE NCCGB1st Sept 2016
2a0a:6880::/2934.4B × /64RIPE NCCGB22nd Nov 2016
2a0a:6e40::/2934.4B × /64RIPE NCCGB27th Mar 2017
2a0a:7100::/2934.4B × /64RIPE NCCGB27th Sept 2016
2a0a:72c0::/324.3B × /64RIPE NCCGB29th Mar 2017
2a0a:8040::/2934.4B × /64RIPE NCCGB4th Apr 2017
2a0a:8100::/2934.4B × /64RIPE NCCGB15th Mar 2018
2a0a:83c0::/2934.4B × /64RIPE NCCGB6th Apr 2017
2a0a:8540::/2934.4B × /64RIPE NCCGB6th Apr 2017
2a0a:8640::/2934.4B × /64RIPE NCCGB6th Apr 2017
2a0a:8980::/2934.4B × /64RIPE NCCGB29th Nov 2016
2a0a:8d00::/2934.4B × /64RIPE NCCGB26th Jan 2024
2a0a:93c0::/2934.4B × /64RIPE NCCGB12th Apr 2017
2a0a:9a80::/324.3B × /64RIPE NCCGB1st Dec 2016
2a0a:9d80::/2934.4B × /64RIPE NCCGB2nd Dec 2016
2a0a:9e80::/2934.4B × /64RIPE NCCGB5th Dec 2016
2a0a:9ec0::/2934.4B × /64RIPE NCCGB18th Apr 2017
2a0a:a280::/324.3B × /64RIPE NCCGB5th Dec 2016
2a0a:a80::/2934.4B × /64RIPE NCCGB3rd Nov 2016
2a0a:ab80::/324.3B × /64RIPE NCCGB6th Dec 2016
2a0a:af80::/2934.4B × /64RIPE NCCGB6th Dec 2016
2a0a:b00::/2934.4B × /64RIPE NCCGB29th Mar 2022
2a0a:b540::/324.3B × /64RIPE NCCGB24th Apr 2017
2a0a:b80::/2934.4B × /64RIPE NCCGB21st Aug 2019
2a0a:c640::/2934.4B × /64RIPE NCCGB2nd May 2017
2a0a:cb40::/2934.4B × /64RIPE NCCGB4th May 2017
2a0a:d2c0::/2934.4B × /64RIPE NCCGB8th May 2017
2a0a:d440::/2934.4B × /64RIPE NCCGB14th Jan 2020
2a0a:dfc0::/324.3B × /64RIPE NCCGB11th May 2017
2a0a:e1c0::/2934.4B × /64RIPE NCCGB11th May 2017