Here is the result. I noticed the dispatcher host is NT3.MYCOMPANY.NET instead of just NT3. I think it is caused by the recent DNS configuration of the machine into the MYCOMPANY.NET domain, while before it was empty.

C:\>lsnrctl services

LSNRCTL for 32-bit Windows: Version 8.1.7.2.0 - Production on 30-OCT-2001 15:56:
44

(c) Copyright 1998 Oracle Corporation. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=111.111.111.11)(PORT=1521)))
Services Summary...
PLSExtProc has 1 service handler(s)
DEDICATED SERVER established:0 refused:0
LOCAL SERVER
orcl has 1 service handler(s)
DEDICATED SERVER established:0 refused:0
LOCAL SERVER
orcl has 2 service handler(s)
DEDICATED SERVER established:1 refused:0
LOCAL SERVER
DISPATCHER established:5 refused:0 current:0 max:1022 state:ready
D000
(ADDRESS=(PROTOCOL=tcp)(HOST=nt3.MYCOMPANY.NET)(PORT=1664))
The command completed successfully