+1-301-(3137000...3137999), Berwyn, Maryland

• For trunk calls: 0 301 3137000 (Trunk Code + National Destination Code + Subscriber Number)
• For international calls: 011 1 301 3137000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number)

3137000 ~ 3137999 (شمارش: 1,000)

Example:

• +1-301-3137000 / 0111-301-3137000 (1301-3137000 / 1-301-3137000)
• +1-301-3137001 / 0111-301-3137001 (1301-3137001 / 1-301-3137001)
• +1-301-3137002 / 0111-301-3137002 (1301-3137002 / 1-301-3137002)
• +1-301-3137003 / 0111-301-3137003 (1301-3137003 / 1-301-3137003)
• +1-301-3137004 / 0111-301-3137004 (1301-3137004 / 1-301-3137004)
• ...
• +1-301-xxxxxxx / 0111-301-xxxxxxx (1301-xxxxxxx / 1-301-xxxxxxx)
• ...
• +1-301-3137995 / 0111-301-3137995 (1301-3137995 / 1-301-3137995)
• +1-301-3137996 / 0111-301-3137996 (1301-3137996 / 1-301-3137996)
• +1-301-3137997 / 0111-301-3137997 (1301-3137997 / 1-301-3137997)
• +1-301-3137998 / 0111-301-3137998 (1301-3137998 / 1-301-3137998)
• +1-301-3137999 / 0111-301-3137999 (1301-3137999 / 1-301-3137999)