+31-50-(3210000...3219999), Groningen, Groningen

• For trunk calls: 0 50 3210000 (Trunk Code + National Destination Code + Subscriber Number)
• For international calls: 00 31 50 3210000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number)

3210000 ~ 3219999 (Liczba: 10,000)

Przykład:

• +31-50-3210000 / 0031-50-3210000 (050-3210000 / 0-50-3210000)
• +31-50-3210001 / 0031-50-3210001 (050-3210001 / 0-50-3210001)
• +31-50-3210002 / 0031-50-3210002 (050-3210002 / 0-50-3210002)
• +31-50-3210003 / 0031-50-3210003 (050-3210003 / 0-50-3210003)
• +31-50-3210004 / 0031-50-3210004 (050-3210004 / 0-50-3210004)
• ...
• +31-50-xxxxxxx / 0031-50-xxxxxxx (050-xxxxxxx / 0-50-xxxxxxx)
• ...
• +31-50-3219995 / 0031-50-3219995 (050-3219995 / 0-50-3219995)
• +31-50-3219996 / 0031-50-3219996 (050-3219996 / 0-50-3219996)
• +31-50-3219997 / 0031-50-3219997 (050-3219997 / 0-50-3219997)
• +31-50-3219998 / 0031-50-3219998 (050-3219998 / 0-50-3219998)
• +31-50-3219999 / 0031-50-3219999 (050-3219999 / 0-50-3219999)