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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 1351 to 1400 of 2663
PrefixAddressesRegistryCountryAllocated
216.249.16.0/221kRIPE NCCGB24th Jan 2001
216.87.55.0/24256RIPE NCCGB9th Jul 1999
217.138.0.0/212kRIPE NCCGB31st Jan 2001
217.140.16.0/204.1kRIPE NCCGB5th Mar 2001
217.154.104.0/24256RIPE NCCGB19th Feb 2001
217.154.12.0/24256RIPE NCCGB19th Feb 2001
217.154.151.0/24256RIPE NCCGB19th Feb 2001
217.154.158.0/24256RIPE NCCGB19th Feb 2001
217.154.209.0/24256RIPE NCCGB19th Feb 2001
217.154.219.0/24256RIPE NCCGB19th Feb 2001
217.154.221.0/24256RIPE NCCGB19th Feb 2001
217.154.236.0/24256RIPE NCCGB19th Feb 2001
217.154.25.0/24256RIPE NCCGB19th Feb 2001
217.154.46.0/24256RIPE NCCGB19th Feb 2001
217.16.48.0/204.1kRIPE NCCGB22nd Nov 2002
217.177.13.0/24256RIPE NCCGB2nd Mar 2001
217.177.96.0/198.2kRIPE NCCGB2nd Mar 2001
217.18.84.0/24256RIPE NCCGB8th Mar 2023
217.18.91.0/24256RIPE NCCGB26th Jan 2026
217.180.0.0/212kRIPE NCCGB2nd Mar 2001
217.180.36.0/23512RIPE NCCGB2nd Mar 2001
217.180.60.0/24256RIPE NCCGB2nd Mar 2001
217.180.8.0/221kRIPE NCCGB2nd Mar 2001
217.197.96.0/24256RIPE NCCGB15th May 2023
217.198.32.0/204.1kRIPE NCCGB3rd May 2001
217.198.48.0/212kRIPE NCCGB5th Nov 2004
217.22.8.0/24256RIPE NCCGB26th Jun 2026
217.29.196.0/221kRIPE NCCGB23rd Oct 2000
217.29.200.0/212kRIPE NCCGB23rd Oct 2000
217.65.74.0/24256RIPE NCCGB11th Jun 2025
2400:33e0::/324.3B × /64APNICGB17th Nov 2021
2400:3d20::/324.3B × /64APNICGB8th Dec 2021
2400:4ee0::/324.3B × /64APNICGB18th Jan 2022
2400:83c0::/324.3B × /64APNICGB28th Dec 2016
2400:9e40::/324.3B × /64APNICGB24th Jan 2017
2400:efc0::/324.3B × /64APNICGB31st Mar 2017
2401:a780::/324.3B × /64APNICGB8th Oct 2014
2405:fb80::/324.3B × /64APNICGB20th Jul 2016
2407:1880::/324.3B × /64APNICGB2nd Sept 2016
2602:f73a::/36268M × /64ARINGB10th Jan 2025
2602:f753::/36268M × /64ARINGB30th Dec 2024
2605:8940::/324.3B × /64ARINGB19th Dec 2019
2620:0:2290::/4865.5k × /64ARINGB3rd Jun 2009
2620:0:300::/4865.5k × /64ARINGB14th May 2007
2a00:1070::/324.3B × /64RIPE NCCGB29th Jun 2009
2a00:10f0::/324.3B × /64RIPE NCCGB13th Jul 2009
2a00:11c8::/324.3B × /64RIPE NCCGB5th Aug 2009
2a00:1350::/324.3B × /64RIPE NCCGB15th Sept 2009
2a00:14a0::/2934.4B × /64RIPE NCCGB9th Oct 2009
2a00:14c8::/324.3B × /64RIPE NCCGB14th Oct 2009