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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

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Countries with the most unannounced blocks, largest first.

Unannounced blocks

85,458 blocks match, ordered by prefix.

Allocated but unannounced blocks, 41901 to 41950 of 85458
Prefix	Addresses	Registry	Country	Allocated
2001:df6:4780::/48	65.5k × /64	APNIC	TW	18th Mar 2021
2001:df6:47c0::/48	65.5k × /64	APNIC	AU	6th Nov 2025
2001:df6:4800::/47	131k × /64	APNIC	NZ	3rd Jun 2014
2001:df6:480::/48	65.5k × /64	APNIC	SG	17th Feb 2021
2001:df6:481::/48	65.5k × /64	APNIC	SG	26th Oct 2023
2001:df6:48c0::/48	65.5k × /64	APNIC	ID	6th Nov 2025
2001:df6:4940::/48	65.5k × /64	APNIC	ID	6th Nov 2025
2001:df6:4980::/48	65.5k × /64	APNIC	VN	19th Mar 2021
2001:df6:4a80::/48	65.5k × /64	APNIC	VN	19th Mar 2021
2001:df6:4ac0::/48	65.5k × /64	APNIC	ID	11th Nov 2025
2001:df6:4b40::/48	65.5k × /64	APNIC	BD	11th Nov 2025
2001:df6:4b80::/48	65.5k × /64	APNIC	MM	19th Mar 2021
2001:df6:4bc0::/48	65.5k × /64	APNIC	BD	11th Nov 2025
2001:df6:4c00::/48	65.5k × /64	APNIC	IN	23rd Sept 2015
2001:df6:4c0::/48	65.5k × /64	APNIC	BD	22nd Aug 2025
2001:df6:4c40::/48	65.5k × /64	APNIC	BD	11th Nov 2025
2001:df6:4c80::/48	65.5k × /64	APNIC	NP	21st Mar 2021
2001:df6:4cc0::/48	65.5k × /64	APNIC	ID	12th Nov 2025
2001:df6:4d40::/48	65.5k × /64	APNIC	IN	12th Nov 2025
2001:df6:4d80::/48	65.5k × /64	APNIC	VN	22nd Mar 2021
2001:df6:4dc0::/48	65.5k × /64	APNIC	ID	13th Nov 2025
2001:df6:4e00::/48	65.5k × /64	APNIC	AU	8th Nov 2016
2001:df6:4e80::/48	65.5k × /64	APNIC	ID	22nd Mar 2021
2001:df6:4f40::/48	65.5k × /64	APNIC	IN	13th Nov 2025
2001:df6:4fc0::/48	65.5k × /64	APNIC	MN	13th Nov 2025
2001:df6:500::/48	65.5k × /64	APNIC	AU	31st Jul 2018
2001:df6:5040::/48	65.5k × /64	APNIC	IN	13th Nov 2025
2001:df6:5080::/48	65.5k × /64	APNIC	IN	23rd Mar 2021
2001:df6:50c0::/48	65.5k × /64	APNIC	VN	13th Nov 2025
2001:df6:5100::/48	65.5k × /64	APNIC	IN	29th Aug 2018
2001:df6:5140::/48	65.5k × /64	APNIC	HK	14th Nov 2025
2001:df6:51c0::/48	65.5k × /64	APNIC	ID	14th Nov 2025
2001:df6:5200::/48	65.5k × /64	APNIC	AU	8th Nov 2016
2001:df6:5240::/48	65.5k × /64	APNIC	IN	14th Nov 2025
2001:df6:5280::/48	65.5k × /64	APNIC	IN	25th Mar 2021
2001:df6:52c0::/48	65.5k × /64	APNIC	IN	14th Nov 2025
2001:df6:5340::/48	65.5k × /64	APNIC	MN	17th Nov 2025
2001:df6:53c0::/48	65.5k × /64	APNIC	ID	17th Nov 2025
2001:df6:540::/48	65.5k × /64	APNIC	HK	22nd Aug 2025
2001:df6:5440::/48	65.5k × /64	APNIC	ID	17th Nov 2025
2001:df6:5480::/48	65.5k × /64	APNIC	BD	25th Mar 2021
2001:df6:5500::/48	65.5k × /64	APNIC	ID	29th Aug 2018
2001:df6:5540::/48	65.5k × /64	APNIC	PH	18th Nov 2025
2001:df6:5580::/48	65.5k × /64	APNIC	IN	25th Mar 2021
2001:df6:55c0::/48	65.5k × /64	APNIC	HK	18th Nov 2025
2001:df6:5600::/48	65.5k × /64	APNIC	ID	8th Nov 2016
2001:df6:5640::/48	65.5k × /64	APNIC	BD	19th Nov 2025
2001:df6:5680::/48	65.5k × /64	APNIC	HK	25th Mar 2021
2001:df6:56c0::/48	65.5k × /64	APNIC	ID	20th Nov 2025
2001:df6:5700::/48	65.5k × /64	APNIC	ID	30th Aug 2018