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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

85,346 blocks match, ordered by prefix.

Allocated but unannounced blocks, 53651 to 53700 of 85346
Prefix	Addresses	Registry	Country	Allocated
2400:cc80::/32	4.3B × /64	APNIC	CN	26th Mar 2014
2400:ccc0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cce0::/32	4.3B × /64	APNIC	ID	20th Dec 2022
2400:cd20::/32	4.3B × /64	APNIC	BD	20th Dec 2022
2400:cd40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cd80::/32	4.3B × /64	APNIC	ID	26th Mar 2014
2400:cda0::/32	4.3B × /64	APNIC	CN	21st Dec 2022
2400:cdc0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:ce00::/32	4.3B × /64	APNIC	CN	22nd Mar 2010
2400:ce20::/32	4.3B × /64	APNIC	JP	23rd Dec 2022
2400:ce40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:ce60::/32	4.3B × /64	APNIC	IN	23rd Dec 2022
2400:ce80::/32	4.3B × /64	APNIC	BD	27th Mar 2014
2400:cec0::/32	4.3B × /64	APNIC	HK	2nd Mar 2017
2400:cf00::/32	4.3B × /64	APNIC	KR	16th May 2011
2400:cf20::/32	4.3B × /64	APNIC	HK	28th Dec 2022
2400:cf40::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:cfc0::/32	4.3B × /64	APNIC	CN	2nd Mar 2017
2400:d040::/32	4.3B × /64	APNIC	LK	3rd Mar 2017
2400:d0a0::/32	4.3B × /64	APNIC	CN	29th Dec 2022
2400:d0c0::/32	4.3B × /64	APNIC	CN	3rd Mar 2017
2400:d0e0::/32	4.3B × /64	APNIC	NZ	1st Jan 2023
2400:d100::/32	4.3B × /64	APNIC	CN	17th May 2011
2400:d140::/32	4.3B × /64	APNIC	ID	6th Mar 2017
2400:d160::/32	4.3B × /64	APNIC	CN	4th Jan 2023
2400:d180::/32	4.3B × /64	APNIC	IN	27th Mar 2014
2400:d1c0::/32	4.3B × /64	APNIC	CN	7th Mar 2017
2400:d200::/32	4.3B × /64	APNIC	CN	22nd Mar 2010
2400:d220::/32	4.3B × /64	APNIC	ID	10th Jan 2023
2400:d260::/32	4.3B × /64	APNIC	MY	10th Jan 2023
2400:d300::/32	4.3B × /64	APNIC	CN	18th May 2011
2400:d340::/32	4.3B × /64	APNIC	BD	8th Mar 2017
2400:d361::/32	4.3B × /64	APNIC	LT	21st Feb 2023
2400:d3a0::/32	4.3B × /64	APNIC	LA	12th Jan 2023
2400:d3c0::/32	4.3B × /64	APNIC	IN	8th Mar 2017
2400:d440::/32	4.3B × /64	APNIC	CN	8th Mar 2017
2400:d4a0::/32	4.3B × /64	APNIC	TW	13th Jan 2023
2400:d4c0::/32	4.3B × /64	APNIC	BD	8th Mar 2017
2400:d500::/32	4.3B × /64	APNIC	AU	18th May 2011
2400:d520::/32	4.3B × /64	APNIC	VN	14th Jan 2023
2400:d560::/32	4.3B × /64	APNIC	VN	14th Jan 2023
2400:d5a0::/32	4.3B × /64	APNIC	VN	14th Jan 2023
2400:d5c0::/32	4.3B × /64	APNIC	AF	9th Mar 2017
2400:d5e0::/32	4.3B × /64	APNIC	VN	14th Jan 2023
2400:d600::/32	4.3B × /64	APNIC	CN	22nd Mar 2010
2400:d620::/32	4.3B × /64	APNIC	VN	14th Jan 2023
2400:d640::/32	4.3B × /64	APNIC	JP	10th Mar 2017
2400:d6a0::/32	4.3B × /64	APNIC	CN	16th Jan 2023
2400:d6c0::/32	4.3B × /64	APNIC	CN	10th Mar 2017
2400:d6e0::/32	4.3B × /64	APNIC	IN	17th Jan 2023