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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 701 to 750 of 2663
PrefixAddressesRegistryCountryAllocated
193.104.144.0/24256RIPE NCCGB19th Nov 2009
193.104.181.0/24256RIPE NCCGB30th Dec 2024
193.104.91.0/24256RIPE NCCGB28th Oct 2009
193.105.120.0/24256RIPE NCCGB15th Feb 2010
193.105.170.0/24256RIPE NCCGB3rd Mar 2010
193.106.12.0/221kRIPE NCCGB26th Nov 2009
193.109.12.0/221kRIPE NCCGB4th May 2018
193.109.254.0/23512RIPE NCCGB5th Nov 2001
193.109.50.0/23512RIPE NCCGB25th Jul 2001
193.110.88.0/24256RIPE NCCGB13th Dec 2001
193.114.160.0/198.2kRIPE NCCGB10th Feb 1994
193.118.176.0/212kRIPE NCCGB10th Feb 1994
193.118.184.0/221kRIPE NCCGB10th Feb 1994
193.118.188.0/23512RIPE NCCGB10th Feb 1994
193.118.190.0/24256RIPE NCCGB10th Feb 1994
193.118.191.0/24256RIPE NCCGB10th Feb 1994
193.128.192.0/204.1kRIPE NCCGB14th Oct 1993
193.128.31.0/24256RIPE NCCGB14th Oct 1993
193.128.76.0/24256RIPE NCCGB14th Oct 1993
193.130.40.0/23512RIPE NCCGB14th Oct 1993
193.132.116.0/221kRIPE NCCGB4th Jul 1994
193.138.95.0/24256RIPE NCCGB24th Feb 2003
193.142.118.0/24256RIPE NCCGB16th Mar 2007
193.142.119.0/24256RIPE NCCGB16th Mar 2007
193.142.220.0/24256RIPE NCCGB26th Mar 2007
193.143.229.0/24256RIPE NCCGB2nd Jun 1994
193.143.90.0/24256RIPE NCCGB18th Nov 2019
193.143.98.0/24256RIPE NCCGB18th Nov 2019
193.148.247.0/24256RIPE NCCGB18th Nov 2019
193.150.188.0/221kRIPE NCCGB15th Dec 1997
193.16.108.0/24256RIPE NCCGB8th Jun 2004
193.160.232.0/221kRIPE NCCGB7th May 2018
193.160.248.0/221kRIPE NCCGB8th May 1995
193.162.44.0/24256RIPE NCCGB4th May 2021
193.163.122.0/23512RIPE NCCGB10th Aug 1994
193.163.190.0/24256RIPE NCCGB21st Aug 2020
193.164.11.0/24256RIPE NCCGB18th Apr 2005
193.164.233.0/24256RIPE NCCGB27th Jun 2000
193.168.167.0/24256RIPE NCCGB5th May 2026
193.169.120.0/23512RIPE NCCGB1st Jul 2009
193.169.140.0/23512RIPE NCCGB14th Jul 2009
193.169.236.0/23512RIPE NCCGB14th Jan 2011
193.169.90.0/23512RIPE NCCGB18th Jun 2009
193.17.128.0/198.2kRIPE NCCGB29th Jul 1992
193.17.160.0/212kRIPE NCCGB29th Jul 1992
193.17.168.0/23512RIPE NCCGB29th Jul 1992
193.17.198.0/24256RIPE NCCGB7th Oct 2004
193.176.232.0/24256RIPE NCCGB5th Oct 2023
193.176.33.0/24256RIPE NCCGB6th Aug 2025
193.176.56.0/221kRIPE NCCGB23rd Feb 1993