So wall of text, but here is the RFC chain.
Hank Magnuski was the original person marked as the 'reference', which is interpreted as 'responsible individual' in these documents. This changed in 1987, when Philip R. Karn was now reflected in that field.
The last RFC I can find that explicitly calls out
44.0.0.0/8 was 1166 , July 1990, again with Phil Karn as the reference, or responsible individual.
==========
Original assignment of 44 in RFC 790 : Sept 1981
https://tools.ietf.org/html/rfc790...
044.rrr.rrr.rrr AMPRNET Amature Radio Experiment Net [HM]
044.rrr.rrr.rrr-126.rrr.rrr.rrr Unassigned [JBP]
...
[HM] Hank Magnuski --- JOSE@PARC-MAXC
==========
Ambiguity corrected in RFC 820:
https://tools.ietf.org/html/rfc820...
R 044.rrr.rrr.rrr AMPRNET Amateur Radio Experiment Net[HM]
R 045.rrr.rrr.rrr T C3-PR Testbed Development PRNET [BG5]
...
[HM] Hank Magnuski --- JOSE@PARC-MAXC
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Maintains references to "Amateur Radio Experiment Net" through multiple RFCs:
870
900
923
943
960
990
997
==========
Reference field changes from [HM] to [PK28] in RFC 1020 : Nov 1987
https://tools.ietf.org/html/rfc1020[PK28] Philip R. Karn, Jr. BCR
Karn@FLASH.BELLCORE.COM==========
"Amateur Radio Experiment Net" disappears, only AMPRNET listed in RFC 1166 :
https://tools.ietf.org/html/rfc1166...
R*43.rrr.rrr.rrr JAPAN-A [JM292]
R 44.rrr.rrr.rrr AMPRNET [PK28]
45.rrr.rrr.rrr Reserved [NIC]
...
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RFC 1166 Updated by RFC 5737, creation of documentation blocks. No references to 44/8.
https://tools.ietf.org/html/rfc5737==========