<![CDATA[This seems like a short IPv6 address 2001:dc3::3]]>This seems like a short IPv6 address 2001:dc3::3

What’s the deal?

]]>https://board.circlewithadot.net/topic/85d65e97-caf6-494a-83cd-ca95bfdd152f/this-seems-like-a-short-ipv6-address-2001-dc3-3RSS for NodeWed, 08 Apr 2026 17:42:21 GMTMon, 06 Apr 2026 05:13:56 GMT60<![CDATA[Reply to This seems like a short IPv6 address 2001:dc3::3 on Mon, 06 Apr 2026 16:36:32 GMT]]>@HopelessDemigod 9 is the highest base-10 numerical digit, but the addresses are written in hexadecimal, so you can go up to f. Each group is made up of four hex digits ranging from 0000 to ffff.

]]>https://board.circlewithadot.net/post/https://infosec.exchange/users/NotYourSysadmin/statuses/116358734952743660https://board.circlewithadot.net/post/https://infosec.exchange/users/NotYourSysadmin/statuses/116358734952743660Mon, 06 Apr 2026 16:36:32 GMT<![CDATA[Reply to This seems like a short IPv6 address 2001:dc3::3 on Mon, 06 Apr 2026 15:53:22 GMT]]>@NotYourSysadmin

What is the largest numerical digit you can use in the last position?

]]>https://board.circlewithadot.net/post/https://mstdn.social/users/HopelessDemigod/statuses/116358565210840709https://board.circlewithadot.net/post/https://mstdn.social/users/HopelessDemigod/statuses/116358565210840709Mon, 06 Apr 2026 15:53:22 GMT<![CDATA[Reply to This seems like a short IPv6 address 2001:dc3::3 on Mon, 06 Apr 2026 15:51:22 GMT]]>@HopelessDemigod Yep, you can just increment the last digit in the address, so you'd use. ...::4

I'd guess you're on a /48 perhaps?

]]>https://board.circlewithadot.net/post/https://infosec.exchange/users/NotYourSysadmin/statuses/116358557343384482https://board.circlewithadot.net/post/https://infosec.exchange/users/NotYourSysadmin/statuses/116358557343384482Mon, 06 Apr 2026 15:51:22 GMT<![CDATA[Reply to This seems like a short IPv6 address 2001:dc3::3 on Mon, 06 Apr 2026 15:31:27 GMT]]>@NotYourSysadmin

Correct.

]]>https://board.circlewithadot.net/post/https://mstdn.social/users/HopelessDemigod/statuses/116358479080558113https://board.circlewithadot.net/post/https://mstdn.social/users/HopelessDemigod/statuses/116358479080558113Mon, 06 Apr 2026 15:31:27 GMT<![CDATA[Reply to This seems like a short IPv6 address 2001:dc3::3 on Mon, 06 Apr 2026 15:08:37 GMT]]>@HopelessDemigod Do you mean when claiming IP addresses on a network for a statically-addressed device?

]]>https://board.circlewithadot.net/post/https://infosec.exchange/users/NotYourSysadmin/statuses/116358389272703061https://board.circlewithadot.net/post/https://infosec.exchange/users/NotYourSysadmin/statuses/116358389272703061Mon, 06 Apr 2026 15:08:37 GMT<![CDATA[Reply to This seems like a short IPv6 address 2001:dc3::3 on Mon, 06 Apr 2026 14:58:11 GMT]]>@NotYourSysadmin

Interesting, so you only need to increment the last digit?

]]>https://board.circlewithadot.net/post/https://mstdn.social/users/HopelessDemigod/statuses/116358348259653149https://board.circlewithadot.net/post/https://mstdn.social/users/HopelessDemigod/statuses/116358348259653149Mon, 06 Apr 2026 14:58:11 GMT<![CDATA[Reply to This seems like a short IPv6 address 2001:dc3::3 on Mon, 06 Apr 2026 14:53:18 GMT]]>@HopelessDemigod In an IPv6 address, everything between double colons is a zero, and leading 0s in a group get dropped. So that address could be written as

2001:0dc3:0000:0000:0000:0000:0000:0003

]]>https://board.circlewithadot.net/post/https://infosec.exchange/users/NotYourSysadmin/statuses/116358329056776933https://board.circlewithadot.net/post/https://infosec.exchange/users/NotYourSysadmin/statuses/116358329056776933Mon, 06 Apr 2026 14:53:18 GMT<![CDATA[Reply to This seems like a short IPv6 address 2001:dc3::3 on Mon, 06 Apr 2026 06:03:00 GMT]]>@lackthereof

It is?

]]>https://board.circlewithadot.net/post/https://mstdn.social/users/HopelessDemigod/statuses/116356243791741759https://board.circlewithadot.net/post/https://mstdn.social/users/HopelessDemigod/statuses/116356243791741759Mon, 06 Apr 2026 06:03:00 GMT<![CDATA[Reply to This seems like a short IPv6 address 2001:dc3::3 on Mon, 06 Apr 2026 05:50:35 GMT]]>@HopelessDemigod
That's an unexpectedly large number of zeros

]]>https://board.circlewithadot.net/post/https://beige.party/users/lackthereof/statuses/116356194961494808https://board.circlewithadot.net/post/https://beige.party/users/lackthereof/statuses/116356194961494808Mon, 06 Apr 2026 05:50:35 GMT