Area Code 399 Phone Directory
Area Codes Starting with 3
- (300) xxx-xxxx
- (301) xxx-xxxx
- (302) xxx-xxxx
- (303) xxx-xxxx
- (304) xxx-xxxx
- (305) xxx-xxxx
- (306) xxx-xxxx
- (307) xxx-xxxx
- (308) xxx-xxxx
- (309) xxx-xxxx
- (310) xxx-xxxx
- (312) xxx-xxxx
- (313) xxx-xxxx
- (314) xxx-xxxx
- (315) xxx-xxxx
- (316) xxx-xxxx
- (317) xxx-xxxx
- (318) xxx-xxxx
- (319) xxx-xxxx
- (320) xxx-xxxx
- (321) xxx-xxxx
- (322) xxx-xxxx
- (323) xxx-xxxx
- (324) xxx-xxxx
- (325) xxx-xxxx
Major Cities in Area Code 399
- Rank:7
- Peoria, IL
- Rank:7
- Nashville, TN
- Rank:5
- Los Angeles, CA
- Rank:5
- Staten Island, NY
- Rank:4
- Phoenix, AZ
- Rank:4
- Tucson, AZ
- Rank:4
- Bakersfield, CA
- Rank:4
- San Jose, CA
- Rank:4
- Victorville, CA
- Rank:4
- Jacksonville, FL
- Rank:4
- Chicago, IL
- Rank:4
- New York, NY
- Rank:4
- Antioch, TN
- Rank:4
- San Antonio, TX
- Rank:3
- Bloomington, IL
- Rank:3
- East Peoria, IL
- Rank:3
- Baltimore, MD
- Rank:3
- Charlotte, NC
- Rank:3
- Brooklyn, NY
- Rank:3
- Fort Worth, TX