Area Code 378 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 378
- Rank:55
- Atlanta, GA
- Rank:22
- Miami, FL
- Rank:22
- Marietta, GA
- Rank:21
- Decatur, GA
- Rank:18
- Lawrenceville, GA
- Rank:17
- Stone Mountain, GA
- Rank:16
- Topeka, KS
- Rank:14
- Lithonia, GA
- Rank:12
- Alpharetta, GA
- Rank:11
- Acworth, GA
- Rank:11
- Douglasville, GA
- Rank:11
- Newnan, GA
- Rank:10
- Norcross, GA
- Rank:10
- Roswell, GA
- Rank:10
- Chicago, IL
- Rank:10
- Shreveport, LA
- Rank:9
- Dallas, GA
- Rank:9
- Jonesboro, GA
- Rank:9
- Macon, GA
- Rank:9
- Brooklyn, NY