| State | Organization | Phone Number |
| Alabama | Alabama One Call | 1-800-292-8525 |
| Alaska | Locate Call Center of Alaska, Inc. | 1-907-278-3121 |
| Arizona | Arizona Blue Stake, Inc. | 1-602-263-1100 |
| Arkansas | Arkansas One Call System, Inc. | 1-800-482-8998 |
| California | Underground Service Alert North, | 1-800-422-4133 |
| Underground Service Alert South, | 1-800-422-4133 |
| Colorado | Utility Notification Center of Colorado, | 1-800-922-1987 |
| Connecticut | Call Before You Dig | 1-800-922-4455 |
| Delaware | Miss Utility of Delmarva | 1-800-282-8555 |
| Florida | Sunshine State One Call of Florida, Inc. | 1-800-432-4770 |
| Georgia | Utilities Protection Center, Inc. | 1-800-282-7411 |
| Hawaii | Hawaii One-Call | 1-800-227-2600 |
| Idaho | Dig Line | 1-800-342-1585 |
| Palouse Empire Undrgrnd Crd. Cncl. | 1-800-822-1974 |
| Kootenai County Utility Coord. Cncl. | 1-800-428-4950 |
| Utilities Underground Location Center | 1-800-424-5555 |
| One Call Concepts - Idaho | 1-800-626-4950 |
| Shoshone county One Call | 1-800-398-3285 |
| Illinois | Julie, Inc. | 1-800-892-0123 |
| Chicago: Digger | 1-312-744-7000 |
| Indiana | Indiana Underground Plant Prototection Service. Inc. | 1-800-382-5544 |
| Iowa | Underground Plant Loc. Service, Inc. | 1-800-292-8989 |
| Kansas | Kansas One Call Center | 1-800-DIG-SAFE |
| Kentucky | Kentucky Underground Protec., Inc. | 1-800-752-6007 |
| Louisiana | Louisiana One Call | 1-800-272-3020 |
| Maine | Dig Safe - Maine | 1-888-344-7233 |
| Maryland | Miss Utility of Delmarva | 1-800-282-8555 |
| Miss Utility | 1-800-257-7777 |
| Massachusetts | Dig Safe - Massachusetts, | 1-888-344-7233 |
| Michigan | MISS DIG System Inc | 1-800-482-7171 |
| Minnesota | Gopher State One Call | 1-800-252-1166 |
| Mississippi | Mississippi One Call System, Inc. | 1-800-227-6477 |
| Missouri | Missouri One Call System, Inc. | 1-800-344-7483 |
| Montana | Utilities Underground Loc. Center | 1-800-424-5555 |
| Montana One Call | 1-800-551-8344 |
| Nebraska | Diggers Hotline of Nebraska | 1-800-331-5666 |
| Nevada | Underground Service Alert of NV | 1-800-227-2600 |
| New Hampshire | Dig Safe - New Hampshire , | 1-888-344-7233 |
| New Jersey | Garden State Undrgrnd. Plnt. Loc. Ser. | 1-800-272-1000 |
| New Mexico | New Mexico One Call system, Inc. | 1-800-321-ALERT |
| New York | Underground Fac. Protection Org. | 1-800-962-7962 |
| New York City - Long Island One Call Center | 1-800-272-4480 |
| North Carolina | North Carolina One-Call Center | 1-800-632-4949 |
| North Dakota | Utilities Underground Location Center | 1-800-795-0555 |
| Ohio | Ohio Utilities Protection Service | 1-800-362-2764 |
| Oklahoma | Call Okie | 1-800-522-6543 |
| Oregon | Utility's Underground Location Center | 1-800-424-5555 |
| Douglas Utility's Coordinating Council | 1-503-673-6676 |
| Josephine Utility's Coord Council | 1-503-476-6676 |
| Utility's Notification Center | 1-800-332-2344 |
| Rogue Basin Utility Coord Council | 1-503-779-6676 |
| Pennsylvania | Pennsylvania One Call System, Inc. | 1-800-242-1776 |
| Rhode Island | Dig Safe - Rhode Island, | 1-888-344-7233 |
| South Carolina | Palmetto Utility Protection Srvce Inc. | 1-800-922-0983 |
| South Dakota | South Dakota One Call | 1-800-781-7474 |
| Tennessee | Tennessee One Call System | 1-800-351-1111 |
| Texas | Lone Star Notification Center | 1-800-669-8344 |
| Texas Excavation Safety System | 1-800-344-8377 |
| Texas One Call system | 1-800-245-4545 |
| Utah | Blue Stakes Location Center | 1-800-662-4111 |
| Vermont | Dig Safe - Vermont, | 1-888-344-7233 |
| Virginia | Miss Utility of Virginia | 1-800-552-7001 |
| Miss Utility of Northern Virginia | 1-800-257-7777 |
| Washington | Utilities Notification Center | 1-800-332-2344 |
| Grays Harbor & Pacific County Utility Coordinating Council | 1-206-532-3550 |
| Utilities Underground Location Center | 1-800-424-5555 |
| Chelan-Douglas Utility Coord Council | 1-509-663-6111 |
| Upper Yakima County Underground Utilities Council | 1-800-553-4344 |
| Inland Empire Utility Coord. Council | 1-509-456-8000 |
| Utilities Council of Cowlitz County | 1-360-425-2506 |
| Palouse Empire Utility Cord. Council | 1-800-822-1974 |
| Washington, DC | Miss Utility | 1-800-257-7777 |
| West Virginia | Miss Utility of West Virginia, Inc. | 1-800-245-4848 |
| Wisconsin | Diggers Hotline, Inc | 1-800-242-8511 |
| Wyoming | Wyoming One-Call | 1-800-348-1030 |
| Call Before You Dig Of Wyoming | 1-800-849-2476 |
| Canada | Alberta: Alberta One-Call Location Corp. | 1-800-242-3447 |
| British Columbia: BC One Call | 1-800-474-6886 |
| Ontario: Ontario One Call Ltd | 1-800-400-2255 or
905-709-1717 |
| Quebec: Info-Excavation | 1-800-663-9228 |
| Australia | Dial Before You Dig | 1100 1100 |