ldns-key2ds(1) on Linux
The text 1b3fb4ef1c39, as Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
transform a DNSKEY RR to a DS RR
Flags it lists
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-1 -
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-n
The text 1b3fb4ef1c39, as Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
transform a DNSKEY RR to a DS RR
-1
-2
-n