Area Code 400 Phone Directory
Phone Numbers that start with (400) 6XX-XXXX
Other (400) xxx-xxxx Numbers
Major Cities in Area Code 400
- Rank:115
- Roanoke, VA
- Rank:90
- Syracuse, NY
- Rank:54
- Cleveland, OH
- Rank:48
- San Jose, CA
- Rank:40
- Baltimore, MD
- Rank:39
- Liverpool, NY
- Rank:34
- Orlando, FL
- Rank:32
- Atlanta, GA
- Rank:29
- Oklahoma City, OK
- Rank:24
- Lorain, OH
- Rank:22
- Omaha, NE
- Rank:19
- Baldwinsville, NY
- Rank:18
- Mesa, AZ
- Rank:18
- Salem, VA
- Rank:18
- Vinton, VA
- Rank:16
- Lincoln, NE
- Rank:16
- Beaumont, TX
- Rank:13
- Elyria, OH
- Rank:12
- Manlius, NY
- Rank:11
- Ashtabula, OH