Hey Kitz,
Here are some more suspected modem identifiers that I have worked out recently.
TCTN TrendChip
CXSY Connexant
STMI ST Micro Electronics
BCLA Alcatel Sachem
CTA ?
ITEX ITEX
CTI Connect Tech
TM Thomson Multimedia?
Those below look like a manufacturer ID
CBAL Alcatel Sachem
LABC Alcatel Sachem
CSCO Cisco
NTGRTM NetGear
MB ?
GPN ?
DLINK Dlink
PRNT ?
SHC
NPSG GlobeSpan
ANDV Analogue Devices
Spn
Hdbgarea No idea, but common
ADTN - Adtran
JPNW - ?
LSI - ?
ONE - One Access
PRNT - ?