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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 4151 to 4200 of 6735
Prefix	Addresses	Registry	Country	Allocated
2400:7ae0::/32	4.3B × /64	APNIC	CN	11th May 2022
2400:7bc0::/32	4.3B × /64	APNIC	CN	15th Dec 2016
2400:7f80::/32	4.3B × /64	APNIC	CN	25th Dec 2013
2400:8080::/32	4.3B × /64	APNIC	CN	25th Dec 2013
2400:8201::/32	4.3B × /64	APNIC	CN	7th Feb 2025
2400:82c0::/32	4.3B × /64	APNIC	CN	27th Dec 2016
2400:8580::/32	4.3B × /64	APNIC	CN	3rd Jan 2014
2400:8600::/32	4.3B × /64	APNIC	CN	17th Mar 2010
2400:86a0::/32	4.3B × /64	APNIC	CN	14th Jun 2022
2400:86e0::/32	4.3B × /64	APNIC	CN	14th Jun 2022
2400:8780::/32	4.3B × /64	APNIC	CN	7th Jan 2014
2400:87c0::/32	4.3B × /64	APNIC	CN	4th Jan 2017
2400:8840::/32	4.3B × /64	APNIC	CN	5th Jan 2017
2400:8920::/32	4.3B × /64	APNIC	CN	17th Jun 2022
2400:8980::/32	4.3B × /64	APNIC	CN	7th Jan 2014
2400:8be0::/32	4.3B × /64	APNIC	CN	24th Jun 2022
2400:8ce0::/32	4.3B × /64	APNIC	CN	27th Jun 2022
2400:8e00::/32	4.3B × /64	APNIC	CN	18th Mar 2010
2400:8e60::/32	4.3B × /64	APNIC	CN	30th Jun 2022
2400:8f00::/32	4.3B × /64	APNIC	CN	29th Apr 2011
2400:8f60::/32	4.3B × /64	APNIC	CN	1st Jul 2022
2400:9040::/32	4.3B × /64	APNIC	CN	12th Jan 2017
2400:93e0::/32	4.3B × /64	APNIC	CN	11th Jul 2022
2400:9520::/32	4.3B × /64	APNIC	CN	12th Jul 2022
2400:95c0::/32	4.3B × /64	APNIC	CN	18th Jan 2017
2400:98c0::/32	4.3B × /64	APNIC	CN	22nd Jan 2017
2400:9960::/32	4.3B × /64	APNIC	CN	26th Jul 2022
2400:99e0::/32	4.3B × /64	APNIC	CN	27th Jul 2022
2400:9a00::/32	4.3B × /64	APNIC	CN	18th Mar 2010
2400:9ca0::/32	4.3B × /64	APNIC	CN	4th Aug 2022
2400:9e00::/32	4.3B × /64	APNIC	CN	18th Mar 2010
2400:a320::/32	4.3B × /64	APNIC	CN	26th Aug 2022
2400:a380::/32	4.3B × /64	APNIC	CN	17th Feb 2014
2400:a420::/32	4.3B × /64	APNIC	CN	30th Aug 2022
2400:a480::/32	4.3B × /64	APNIC	CN	18th Feb 2014
2400:a5a0::/32	4.3B × /64	APNIC	CN	31st Aug 2022
2400:a780::/32	4.3B × /64	APNIC	CN	19th Feb 2014
2400:a8a0::/32	4.3B × /64	APNIC	CN	8th Sept 2022
2400:a8c0::/32	4.3B × /64	APNIC	CN	6th Feb 2017
2400:a900::/32	4.3B × /64	APNIC	CN	5th May 2011
2400:a9a0::/32	4.3B × /64	APNIC	CN	9th Sept 2022
2400:abc0::/32	4.3B × /64	APNIC	CN	10th Feb 2017
2400:b500::/32	4.3B × /64	APNIC	CN	10th May 2011
2400:b6c0::/32	4.3B × /64	APNIC	CN	17th Feb 2017
2400:b9a0::/32	4.3B × /64	APNIC	CN	24th Oct 2022
2400:b9c0::/32	4.3B × /64	APNIC	CN	20th Feb 2017
2400:ba00::/32	4.3B × /64	APNIC	CN	19th Mar 2010
2400:bf00::/32	4.3B × /64	APNIC	CN	11th May 2011
2400:c200::/32	4.3B × /64	APNIC	CN	19th Mar 2010
2400:c380::/32	4.3B × /64	APNIC	CN	14th Mar 2014