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About Granite

Granite provides voice, data and other related communications products and services to multi-location businesses and governmental agencies throughout the United States and Canada. Granite furnishes services to more than two-thirds of the Fortune 100 companies in the United States, and 1.75 million voice and data lines under management.

Products

Mobility
Voice
Managed Solutions
Data
Network Integration
Granite Grid

Contact

Headquarters

100 Newport Avenue Extension
Quincy, MA 02171

Phone: 866.847.1500

Fax: 617.328.0312

Guides and Documents
- Granite Voicemail User Guide
Regulatory & Tax Change Notices

FAQ - AREA CODE OVERLAY AND SPLIT
Overlay AL 938 - 256 [ 1st NOT. / 2nd NOT ]
Overlay CA 279 - 916 [ 1st NOT.] / 2nd NOT. ]
Overlay CA 442 - 760 [ 1st NOT. / 2nd NOT. ]
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Overlay CA 628 - 415 [ 1st NOT. / 2nd NOT. ]
Overlay CA 669 - 408 [ 1st NOT. / 2nd NOT. ]
Overlay CA 805 - 820 [ 1st NOT.]
Overlay CA 818 - 747 [ 2nd NOT.]
Overlay CT 475 - 203 [ 1st NOT. / 2nd NOT. ]
Overlay CT 959 - 860 [ 1st NOT.]
Overlay FL 786 - 305 [ 2nd NOT.]
Overlay ID 986 - 208 [ 1st NOT. / 2nd NOT. ]
Overlay IL 312 - 773 [ 1st NOT. / 2nd NOT. ]
Overlay IN 463 - 317 [ 1st NOT. / 2nd NOT. ]
Overlay IN 930 - 812 [ 1st NOT. / 2nd NOT. ]
Overlay KY 364 - 270 [ 1st NOT. / 2nd NOT. ]
Overlay MD 410 - 433 [ 1st NOT. ]
Overlay NC 984 - 919 [ 1st NOT. / 2nd NOT. ]
Overlay NC 743 - 336 [ 1st NOT.] / 2nd NOT. ]
Overlay NE 531 - 402 [ 1st NOT. ]
Overlay NJ 609 - 640 [ 1st NOT. ]
Overlay NY 680 - 315 [ 1st NOT. / 2nd NOT. ]
Overlay NY 838 - 518 [ 1st NOT. / 2nd NOT.]

Overlay NY 718 - 347 [ 1st NOT. / 2nd NOT. ]
Overlay NY 934 - 631 [ 1st NOT.] / 2nd NOT. ]
Overlay NY 934 - 631 [ Final Notification ]
Overlay OK 539 - 918 [ 1st NOT. / 2nd NOT. ]

Overlay OH 220 - 740 [ 1st NOT. / 2nd NOT. ]
Overlay OH 380 - 614 [ 1st NOT. / 2nd NOT. ]
Overlay OR 458 - 541 [ 1st NOT. / 2nd NOT. ]
Overlay PA 215 - 267 [ 1st NOT. ]
Overlay PA 272 - 570 [ 1st NOT. ]
Overlay PA 223 - 717 [ 1st NOT. / 2nd NOT. ]
Overlay SC 854 - 843 [ 1st NOT. / 2nd NOT. ]
Overlay TN 629 - 615 [ 1st NOT. / 2nd NOT. ]
Overlay TX 737 - 512 [ 1st NOT. / 2nd NOT. ]
Overlay TX 346 - 281 / 713 / 832 [ 1st NOT. ]
Overlay TX 726 - 210 [ 1st NOT. / 2nd NOT.]
Overlay WA 564 - 360 [ 1st NOT. / 2nd NOT.]
Overlay WI 534 - 715 [ 1st NOT. / 2nd NOT. ]
Overlay WI 274 - 920 [ 1st NOT. / 2nd NOT. ]
Overlay UT Relief Plan 385 [ 1st NOT. ]
Overlay CAN 431 - 204 [ 1st NOT. / 2nd NOT. ]
Overlay CAN 873 - 819 [ 1st NOT. / 2nd NOT. ]
Overlay CAN 236 - 250 / 604 / 778 [ 1st NOT. / 2nd NOT. ]
Overlay CAN 367 - 418 / 581 [ 1st NOT. ]
Overlay CAN 437 - 416 / 647 [ 1st NOT. ]
Overlay CAN 365 - 289 / 905 [ 1st NOT. ]
Overlay CAN 639 - 306 [ 2nd NOT. ]
Overlay CAN 709 - 879 [ 1st NOT. / 2nd NOT. ]
Overlay CAN 782 - 902 [ 1st NOT. / 2nd NOT. ]
Overlay CAN AL 825 - 403 / 587 / 780 [ 1st NOT.] / 2nd NOT. ]
Overlay CAN ON 548 - 226 / 519 [ 1st NOT.] / 2nd NOT. ]
Overlay CAN ON 548 - 226 / 519 [ Final Notification ]

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