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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through ARIN, largest first.

Unannounced blocks in Canada

3,775 blocks match, ordered by prefix.

Allocated but unannounced blocks, 1801 to 1850 of 3775
PrefixAddressesRegistryCountryAllocated
2001:19a8::/324.3B × /64ARINCA22nd Jul 2004
2001:504:117::/4865.5k × /64ARINCA23rd Mar 2022
2001:504:132::/4865.5k × /64ARINCA29th Sept 2023
2001:504:15::/4865.5k × /64ARINCA12th May 2008
2001:504:19::/4865.5k × /64ARINCA22nd Feb 2010
2001:504:1a::/4865.5k × /64ARINCA31st Mar 2010
2001:504:25::/4865.5k × /64ARINCA2nd Mar 2012
2001:504:26::/4865.5k × /64ARINCA28th Jun 2012
2001:504:2c::/4865.5k × /64ARINCA8th Mar 2013
2001:504:2d::/4865.5k × /64ARINCA21st Mar 2013
2001:504:2f::/4865.5k × /64ARINCA8th Jul 2013
2001:504:37::/4865.5k × /64ARINCA21st Feb 2014
2001:504:39::/4865.5k × /64ARINCA23rd Apr 2014
2001:504:46::/4865.5k × /64ARINCA31st Mar 2015
2001:504:69::/4865.5k × /64ARINCA3rd Mar 2017
2001:504:73::/4865.5k × /64ARINCA29th Aug 2017
2001:504:96::/4865.5k × /64ARINCA25th Jan 2019
2001:504:9c::/4865.5k × /64ARINCA8th Jan 2020
2001:505:147::/4865.5k × /64ARINCA8th Dec 2025
203.7.174.0/23512ARINCA5th Oct 2020
204.10.116.0/221kARINCA25th Mar 2020
204.106.8.0/212kARINCA29th Jan 2009
204.107.14.0/23512ARINCA31st Mar 2021
204.11.8.0/212kARINCA15th Sept 2022
204.138.1.0/24256ARINCA30th Aug 1994
204.138.103.0/24256ARINCA17th Apr 1995
204.138.105.0/24256ARINCA30th Aug 1994
204.138.116.0/24256ARINCA30th Aug 1994
204.138.138.0/23512ARINCA30th Aug 1994
204.138.140.0/24256ARINCA30th Aug 1994
204.138.141.0/24256ARINCA30th Aug 1994
204.138.142.0/24256ARINCA30th Aug 1994
204.138.143.0/24256ARINCA30th Aug 1994
204.138.144.0/24256ARINCA30th Aug 1994
204.138.151.0/24256ARINCA30th Aug 1994
204.138.154.0/23512ARINCA30th Aug 1994
204.138.158.0/24256ARINCA30th Aug 1994
204.138.159.0/24256ARINCA30th Aug 1994
204.138.16.0/212kARINCA30th Aug 1994
204.138.160.0/221kARINCA30th Aug 1994
204.138.164.0/24256ARINCA30th Aug 1994
204.138.166.0/24256ARINCA30th Aug 1994
204.138.170.0/24256ARINCA30th Aug 1994
204.138.171.0/24256ARINCA30th Aug 1994
204.138.172.0/24256ARINCA30th Aug 1994
204.138.173.0/24256ARINCA30th Aug 1994
204.138.174.0/23512ARINCA30th Aug 1994
204.138.176.0/23512ARINCA11th Oct 1994
204.138.178.0/24256ARINCA30th Aug 1994
204.138.182.0/24256ARINCA30th Aug 1994