Usually it is sent as an informational NMEA message $GPTXT
when you connect to the serial/USB port.
Here is an example for TIM-4A
$GPTXT,01,01,02,u-blox ag - www.u-blox.com*50
$GPTXT,01,01,02,ANTARIS ATR0621 HW 00040001*67
$GPTXT,01,01,02,ROM CORE 4.00 Dec 23 2004 12:00:00*7A
$GPTXT,01,01,02,LIC 5313-D494-A4A6-DF28-29A9*2B
The “wiki” custom sequence is valid only for “ROM CORE 5.00”
$GPTXT,01,01,02,u-blox ag - www.u-blox.com*50
$GPTXT,01,01,02,ANTARIS ATR062x HW 00040001*2E
$GPTXT,01,01,02,ROM CORE 5.00 Jan 09 2006 12:00:00*76
$GPTXT,01,01,02,LIC 45CF-6311-188B-04EA-22C6*2C
and probably will not work on “ROM CORE 4.00”.
In u-center you can also use “View->Messages view->UBX->MON->VER” to see the hardware
and software version of your receiver.