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 Boston:
| (617) 204-XXXX | (617) 205-XXXX | (617) 210-XXXX |
| (617) 212-XXXX | (617) 217-XXXX | (617) 222-XXXX |
| (617) 223-XXXX | (617) 224-XXXX | (617) 226-XXXX |
| (617) 227-XXXX | (617) 228-XXXX | (617) 235-XXXX |
| (617) 236-XXXX | (617) 239-XXXX | (617) 246-XXXX |
| (617) 247-XXXX | (617) 248-XXXX | (617) 255-XXXX |
| (617) 259-XXXX | (617) 261-XXXX | (617) 262-XXXX |
| (617) 263-XXXX | (617) 266-XXXX | (617) 267-XXXX |
| (617) 275-XXXX | (617) 279-XXXX | (617) 283-XXXX |
| (617) 289-XXXX | (617) 292-XXXX | (617) 293-XXXX |
| (617) 295-XXXX | (617) 303-XXXX | (617) 304-XXXX |
| (617) 305-XXXX | (617) 306-XXXX | (617) 309-XXXX |
| (617) 310-XXXX | (617) 312-XXXX | (617) 314-XXXX |
| (617) 316-XXXX | (617) 320-XXXX | (617) 330-XXXX |
| (617) 331-XXXX | (617) 338-XXXX | (617) 341-XXXX |
| (617) 342-XXXX | (617) 343-XXXX | (617) 345-XXXX |
| (617) 346-XXXX | (617) 348-XXXX | (617) 350-XXXX |
| (617) 351-XXXX | (617) 352-XXXX | (617) 353-XXXX |
| (617) 356-XXXX | (617) 357-XXXX | (617) 358-XXXX |
| (617) 366-XXXX | (617) 367-XXXX | (617) 368-XXXX |
| (617) 369-XXXX | (617) 371-XXXX | (617) 372-XXXX |
| (617) 373-XXXX | (617) 375-XXXX | (617) 377-XXXX |
| (617) 378-XXXX | (617) 385-XXXX | (617) 391-XXXX |
| (617) 392-XXXX | (617) 399-XXXX | (617) 406-XXXX |
| (617) 407-XXXX | (617) 412-XXXX | (617) 413-XXXX |
| (617) 414-XXXX | (617) 416-XXXX | (617) 419-XXXX |
| (617) 421-XXXX | (617) 422-XXXX | (617) 423-XXXX |
| (617) 424-XXXX | (617) 425-XXXX | (617) 426-XXXX |
| (617) 428-XXXX | (617) 429-XXXX | (617) 434-XXXX |
| (617) 437-XXXX | (617) 438-XXXX | (617) 439-XXXX |
| (617) 443-XXXX | (617) 447-XXXX | (617) 448-XXXX |
| (617) 449-XXXX | (617) 450-XXXX | (617) 451-XXXX |
| (617) 456-XXXX | (617) 457-XXXX | (617) 459-XXXX |
| (617) 470-XXXX | (617) 476-XXXX | (617) 478-XXXX |
| (617) 480-XXXX | (617) 482-XXXX | (617) 488-XXXX |
| (617) 490-XXXX | (617) 502-XXXX | (617) 504-XXXX |
| (617) 507-XXXX | (617) 510-XXXX | (617) 512-XXXX |
| (617) 513-XXXX | (617) 515-XXXX | (617) 517-XXXX |
| (617) 518-XXXX | (617) 519-XXXX | (617) 521-XXXX |
| (617) 523-XXXX | (617) 526-XXXX | (617) 530-XXXX |
| (617) 531-XXXX | (617) 532-XXXX | (617) 534-XXXX |
| (617) 535-XXXX | (617) 536-XXXX | (617) 542-XXXX |
| (617) 543-XXXX | (617) 549-XXXX | (617) 556-XXXX |
| (617) 557-XXXX | (617) 563-XXXX | (617) 565-XXXX |
| (617) 570-XXXX | (617) 571-XXXX | (617) 572-XXXX |
| (617) 573-XXXX | (617) 574-XXXX | (617) 578-XXXX |
| (617) 579-XXXX | (617) 585-XXXX | (617) 587-XXXX |
| (617) 589-XXXX | (617) 590-XXXX | (617) 592-XXXX |
| (617) 593-XXXX | (617) 594-XXXX | (617) 595-XXXX |
| (617) 598-XXXX | (617) 603-XXXX | (617) 619-XXXX |
| (617) 620-XXXX | (617) 624-XXXX | (617) 626-XXXX |
| (617) 635-XXXX | (617) 636-XXXX | (617) 637-XXXX |
| (617) 638-XXXX | (617) 643-XXXX | (617) 645-XXXX |
| (617) 646-XXXX | (617) 648-XXXX | (617) 650-XXXX |
| (617) 654-XXXX | (617) 662-XXXX | (617) 664-XXXX |
| (617) 670-XXXX | (617) 671-XXXX | (617) 680-XXXX |
| (617) 683-XXXX | (617) 686-XXXX | (617) 692-XXXX |
| (617) 694-XXXX | (617) 695-XXXX | (617) 697-XXXX |
| (617) 699-XXXX | (617) 717-XXXX | (617) 719-XXXX |
| (617) 720-XXXX | (617) 721-XXXX | (617) 722-XXXX |
| (617) 723-XXXX | (617) 724-XXXX | (617) 725-XXXX |
| (617) 726-XXXX | (617) 727-XXXX | (617) 728-XXXX |
| (617) 733-XXXX | (617) 737-XXXX | (617) 742-XXXX |
| (617) 743-XXXX | (617) 747-XXXX | (617) 748-XXXX |
| (617) 753-XXXX | (617) 755-XXXX | (617) 756-XXXX |
| (617) 757-XXXX | (617) 760-XXXX | (617) 763-XXXX |
| (617) 772-XXXX | (617) 777-XXXX | (617) 778-XXXX |
| (617) 780-XXXX | (617) 784-XXXX | (617) 785-XXXX |
| (617) 788-XXXX | (617) 790-XXXX | (617) 794-XXXX |
| (617) 799-XXXX | (617) 814-XXXX | (617) 816-XXXX |
| (617) 818-XXXX | (617) 820-XXXX | (617) 823-XXXX |
| (617) 824-XXXX | (617) 828-XXXX | (617) 830-XXXX |
| (617) 832-XXXX | (617) 834-XXXX | (617) 835-XXXX |
| (617) 838-XXXX | (617) 839-XXXX | (617) 840-XXXX |
| (617) 848-XXXX | (617) 849-XXXX | (617) 850-XXXX |
| (617) 851-XXXX | (617) 854-XXXX | (617) 856-XXXX |
| (617) 859-XXXX | (617) 861-XXXX | (617) 865-XXXX |
| (617) 867-XXXX | (617) 869-XXXX | (617) 872-XXXX |
| (617) 875-XXXX | (617) 877-XXXX | (617) 878-XXXX |
| (617) 880-XXXX | (617) 888-XXXX | (617) 892-XXXX |
| (617) 894-XXXX | (617) 896-XXXX | (617) 897-XXXX |
| (617) 901-XXXX | (617) 904-XXXX | (617) 908-XXXX |
| (617) 912-XXXX | (617) 918-XXXX | (617) 919-XXXX |
| (617) 921-XXXX | (617) 927-XXXX | (617) 931-XXXX |
| (617) 933-XXXX | (617) 936-XXXX | (617) 937-XXXX |
| (617) 938-XXXX | (617) 939-XXXX | (617) 943-XXXX |
| (617) 946-XXXX | (617) 947-XXXX | (617) 948-XXXX |
| (617) 951-XXXX | (617) 954-XXXX | (617) 956-XXXX |
| (617) 959-XXXX | (617) 960-XXXX | (617) 961-XXXX |
| (617) 973-XXXX | (617) 986-XXXX | (617) 988-XXXX |
| (617) 994-XXXX | (857) 204-XXXX | (857) 205-XXXX |
| (857) 221-XXXX | (857) 222-XXXX | (857) 233-XXXX |
| (857) 239-XXXX | (857) 246-XXXX | (857) 254-XXXX |
| (857) 264-XXXX | (857) 277-XXXX | (857) 362-XXXX |
| (857) 366-XXXX | (857) 383-XXXX | (857) 413-XXXX |
| (857) 444-XXXX | (857) 445-XXXX | (857) 449-XXXX |
| (857) 453-XXXX | (857) 472-XXXX | (857) 488-XXXX |
| (857) 753-XXXX | (857) 891-XXXX | (857) 931-XXXX |
| (857) 991-XXXX |