A rate center is an area in which all telephone calls are normally local to each other. Calls between nearby rate centers may also be local. Rate center names are usually town names, suburb names or in larger metro areas may be "Dialing zone" names.
The following area codes and exchanges are in rate center Columbia:
| (803) 206-XXXX | (803) 210-XXXX | (803) 212-XXXX |
| (803) 213-XXXX | (803) 214-XXXX | (803) 216-XXXX |
| (803) 217-XXXX | (803) 223-XXXX | (803) 227-XXXX |
| (803) 231-XXXX | (803) 233-XXXX | (803) 234-XXXX |
| (803) 237-XXXX | (803) 238-XXXX | (803) 239-XXXX |
| (803) 240-XXXX | (803) 241-XXXX | (803) 248-XXXX |
| (803) 250-XXXX | (803) 251-XXXX | (803) 252-XXXX |
| (803) 253-XXXX | (803) 254-XXXX | (803) 255-XXXX |
| (803) 256-XXXX | (803) 260-XXXX | (803) 261-XXXX |
| (803) 264-XXXX | (803) 269-XXXX | (803) 296-XXXX |
| (803) 301-XXXX | (803) 303-XXXX | (803) 304-XXXX |
| (803) 306-XXXX | (803) 309-XXXX | (803) 312-XXXX |
| (803) 315-XXXX | (803) 318-XXXX | (803) 319-XXXX |
| (803) 331-XXXX | (803) 333-XXXX | (803) 343-XXXX |
| (803) 344-XXXX | (803) 348-XXXX | (803) 351-XXXX |
| (803) 352-XXXX | (803) 354-XXXX | (803) 355-XXXX |
| (803) 360-XXXX | (803) 361-XXXX | (803) 365-XXXX |
| (803) 369-XXXX | (803) 373-XXXX | (803) 376-XXXX |
| (803) 381-XXXX | (803) 382-XXXX | (803) 397-XXXX |
| (803) 400-XXXX | (803) 401-XXXX | (803) 403-XXXX |
| (803) 407-XXXX | (803) 409-XXXX | (803) 413-XXXX |
| (803) 414-XXXX | (803) 415-XXXX | (803) 419-XXXX |
| (803) 422-XXXX | (803) 429-XXXX | (803) 434-XXXX |
| (803) 446-XXXX | (803) 447-XXXX | (803) 451-XXXX |
| (803) 454-XXXX | (803) 461-XXXX | (803) 462-XXXX |
| (803) 463-XXXX | (803) 465-XXXX | (803) 466-XXXX |
| (803) 467-XXXX | (803) 476-XXXX | (803) 477-XXXX |
| (803) 479-XXXX | (803) 503-XXXX | (803) 504-XXXX |
| (803) 513-XXXX | (803) 518-XXXX | (803) 528-XXXX |
| (803) 530-XXXX | (803) 540-XXXX | (803) 544-XXXX |
| (803) 545-XXXX | (803) 546-XXXX | (803) 551-XXXX |
| (803) 553-XXXX | (803) 556-XXXX | (803) 561-XXXX |
| (803) 569-XXXX | (803) 576-XXXX | (803) 586-XXXX |
| (803) 598-XXXX | (803) 600-XXXX | (803) 603-XXXX |
| (803) 605-XXXX | (803) 606-XXXX | (803) 608-XXXX |
| (803) 609-XXXX | (803) 612-XXXX | (803) 622-XXXX |
| (803) 629-XXXX | (803) 647-XXXX | (803) 654-XXXX |
| (803) 665-XXXX | (803) 667-XXXX | (803) 673-XXXX |
| (803) 690-XXXX | (803) 691-XXXX | (803) 695-XXXX |
| (803) 698-XXXX | (803) 699-XXXX | (803) 705-XXXX |
| (803) 708-XXXX | (803) 714-XXXX | (803) 719-XXXX |
| (803) 726-XXXX | (803) 727-XXXX | (803) 728-XXXX |
| (803) 730-XXXX | (803) 731-XXXX | (803) 732-XXXX |
| (803) 733-XXXX | (803) 734-XXXX | (803) 735-XXXX |
| (803) 736-XXXX | (803) 737-XXXX | (803) 738-XXXX |
| (803) 739-XXXX | (803) 740-XXXX | (803) 741-XXXX |
| (803) 742-XXXX | (803) 743-XXXX | (803) 744-XXXX |
| (803) 748-XXXX | (803) 749-XXXX | (803) 750-XXXX |
| (803) 751-XXXX | (803) 753-XXXX | (803) 754-XXXX |
| (803) 755-XXXX | (803) 758-XXXX | (803) 760-XXXX |
| (803) 763-XXXX | (803) 765-XXXX | (803) 767-XXXX |
| (803) 771-XXXX | (803) 772-XXXX | (803) 776-XXXX |
| (803) 777-XXXX | (803) 779-XXXX | (803) 781-XXXX |
| (803) 782-XXXX | (803) 783-XXXX | (803) 786-XXXX |
| (803) 787-XXXX | (803) 788-XXXX | (803) 790-XXXX |
| (803) 791-XXXX | (803) 794-XXXX | (803) 796-XXXX |
| (803) 798-XXXX | (803) 799-XXXX | (803) 806-XXXX |
| (803) 822-XXXX | (803) 832-XXXX | (803) 863-XXXX |
| (803) 865-XXXX | (803) 870-XXXX | (803) 873-XXXX |
| (803) 880-XXXX | (803) 896-XXXX | (803) 898-XXXX |
| (803) 917-XXXX | (803) 920-XXXX | (803) 926-XXXX |
| (803) 929-XXXX | (803) 931-XXXX | (803) 933-XXXX |
| (803) 935-XXXX | (803) 936-XXXX | (803) 939-XXXX |
| (803) 954-XXXX | (803) 955-XXXX | (803) 960-XXXX |
| (803) 975-XXXX | (803) 977-XXXX | (803) 978-XXXX |
| (803) 988-XXXX |