+1-301-(3123000...3123999), Bethesda, Maryland

• For trunk calls: 0 301 3123000 (Trunk Code + National Destination Code + Subscriber Number)
• For international calls: 011 1 301 3123000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number)

3123000 ~ 3123999 (العدد: 1,000)

Example:

• +1-301-3123000 / 0111-301-3123000 (1301-3123000 / 1-301-3123000)
• +1-301-3123001 / 0111-301-3123001 (1301-3123001 / 1-301-3123001)
• +1-301-3123002 / 0111-301-3123002 (1301-3123002 / 1-301-3123002)
• +1-301-3123003 / 0111-301-3123003 (1301-3123003 / 1-301-3123003)
• +1-301-3123004 / 0111-301-3123004 (1301-3123004 / 1-301-3123004)
• ...
• +1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx)
• ...
• +1-301-3123995 / 0111-301-3123995 (1301-3123995 / 1-301-3123995)
• +1-301-3123996 / 0111-301-3123996 (1301-3123996 / 1-301-3123996)
• +1-301-3123997 / 0111-301-3123997 (1301-3123997 / 1-301-3123997)
• +1-301-3123998 / 0111-301-3123998 (1301-3123998 / 1-301-3123998)
• +1-301-3123999 / 0111-301-3123999 (1301-3123999 / 1-301-3123999)