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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.

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Countries with the most unannounced blocks, largest first.

Unannounced blocks in China

6,735 blocks match, ordered by prefix.

Allocated but unannounced blocks, 4251 to 4300 of 6735
Prefix	Addresses	Registry	Country	Allocated
2400:f840::/32	4.3B × /64	APNIC	CN	14th Apr 2017
2400:f860::/32	4.3B × /64	APNIC	CN	24th Apr 2023
2400:f980::/32	4.3B × /64	APNIC	CN	8th May 2014
2400:fac0::/32	4.3B × /64	APNIC	CN	17th Apr 2017
2400:fb40::/32	4.3B × /64	APNIC	CN	19th Apr 2017
2400:fb60::/32	4.3B × /64	APNIC	CN	8th May 2023
2400:fbc0::/32	4.3B × /64	APNIC	CN	19th Apr 2017
2400:fc40::/32	4.3B × /64	APNIC	CN	19th Apr 2017
2400:fcc0::/32	4.3B × /64	APNIC	CN	19th Apr 2017
2401:1000::/32	4.3B × /64	APNIC	CN	9th Nov 2007
2401:11c0::/32	4.3B × /64	APNIC	CN	2nd May 2017
2401:12c0::/32	4.3B × /64	APNIC	CN	3rd May 2017
2401:140::/32	4.3B × /64	APNIC	CN	21st Apr 2017
2401:15c0::/32	4.3B × /64	APNIC	CN	4th May 2017
2401:18c0::/32	4.3B × /64	APNIC	CN	4th May 2017
2401:18e0::/28	68.7B × /64	APNIC	CN	14th Jul 2023
2401:1940::/32	4.3B × /64	APNIC	CN	4th May 2017
2401:19c0::/32	4.3B × /64	APNIC	CN	4th May 2017
2401:1a40::/32	4.3B × /64	APNIC	CN	4th May 2017
2401:1ac0::/32	4.3B × /64	APNIC	CN	4th May 2017
2401:1c0::/32	4.3B × /64	APNIC	CN	21st Apr 2017
2401:1c60::/32	4.3B × /64	APNIC	CN	24th Jul 2023
2401:1ce0::/32	4.3B × /64	APNIC	CN	24th Jul 2023
2401:1da0::/32	4.3B × /64	APNIC	CN	26th Jul 2023
2401:1dc0::/32	4.3B × /64	APNIC	CN	5th May 2017
2401:1de0::/32	4.3B × /64	APNIC	CN	28th Jul 2023
2401:1e00::/32	4.3B × /64	APNIC	CN	29th Mar 2010
2401:1ec0::/32	4.3B × /64	APNIC	CN	10th May 2017
2401:1f40::/32	4.3B × /64	APNIC	CN	10th May 2017
2401:2040::/32	4.3B × /64	APNIC	CN	11th May 2017
2401:2080::/32	4.3B × /64	APNIC	CN	17th Jun 2014
2401:23c0::/32	4.3B × /64	APNIC	CN	16th May 2017
2401:2600::/32	4.3B × /64	APNIC	CN	30th Mar 2010
2401:2980::/32	4.3B × /64	APNIC	CN	24th Jun 2014
2401:2b40::/32	4.3B × /64	APNIC	CN	24th May 2017
2401:2e20::/32	4.3B × /64	APNIC	CN	1st Sept 2023
2401:3100::/32	4.3B × /64	APNIC	CN	15th Jun 2011
2401:3380::/32	4.3B × /64	APNIC	CN	15th Jul 2014
2401:33c0::/32	4.3B × /64	APNIC	CN	31st May 2017
2401:3440::/32	4.3B × /64	APNIC	CN	1st Jun 2017
2401:34c0::/32	4.3B × /64	APNIC	CN	1st Jun 2017
2401:3640::/32	4.3B × /64	APNIC	CN	2nd Jun 2017
2401:3780::/32	4.3B × /64	APNIC	CN	16th Jul 2014
2401:3a00::/32	4.3B × /64	APNIC	CN	6th Apr 2010
2401:3c20::/32	4.3B × /64	APNIC	CN	22nd Sept 2023
2401:4080::/32	4.3B × /64	APNIC	CN	22nd Jul 2014
2401:4b00::/32	4.3B × /64	APNIC	CN	24th Jun 2011
2401:4f80::/32	4.3B × /64	APNIC	CN	23rd Jul 2014
2401:540::/32	4.3B × /64	APNIC	CN	26th Apr 2017
2401:5680::/32	4.3B × /64	APNIC	CN	6th Aug 2014