# The Wireless Telegraphy (Licence Charges) Regulations 1999, Paragraph 1: 4 GHz band


(National Grid References for 25km × 25km areas)
NX5075
NX7575
NY0075
NY2525
NY5025
SD5025
SD7525
SE0025
SE5025
SD5000
SD7500
SE0000
SE2500
SE5000
SJ5075
SJ7575
SJ0075
SK2575
SK5075
SJ0050
SJ2550
SJ5050
SJ7550
SJ0025
SJ2525
SJ5025
SJ7525
TF0025
TF2525
SJ7500
SP0000
SJ2500
SJ5000
SJ7500
TF0000
TF2500
SO7575
SP0075
SP2575
SP5075
SP7575
TL0075
TL2575
SO7550
SP0050
SP2550
SP5075
SO2500
SO5000
SO7500
SP0000
SP7500
TL0000
TL2500
ST2575
ST5075
ST7550
SU5075
SU7575
TQ0075
TQ2575
ST2550
ST5050
ST7575
SU5050
SU7550
TQ0050
TQ2550
TQ5050
SS5000
SX0075
SX2575
SX5075
SX7575
SX2550
SX5050
SX7550

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Source: https://www.legislation.gov.uk/uksi/1999/1774/schedule/3/paragraph/1 (the official version)
Page: https://openlegislation.uk/wireless-telegraphy-licence-charges-regulations-1999/schedule-3/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.