Every number on DialWhere comes from these files. The table shows the date each file describes, the day we downloaded it, and its SHA-256 checksum. The FTC archive of 30 daily files covers complaints created Sep 11 – Oct 22, 2026.
| Source | Used for | Data as of | Downloaded | SHA-256 | Terms |
|---|---|---|---|---|---|
| NANPA NPA database (npa_report.csv) | codes, locations, dates, overlays, time zones, dialing | Oct 24, 2026 | 20351da51316807d0e16f23a60cb17fed5d9b5d7dd66d9081e012afbc78aeb15 | Public numbering reports of the U.S. numbering administrator; facts used with attribution, presentation not copied. | |
| NANPA central office code assignments, all states | prefixes per area code, rate centers, original holders | Oct 24, 2026 | 49fdfe0c1a8455483636dd29f8df99caa491bd5566a39808a9e1ed99444db462 | Same as above. NANPA notes these files do not include all information needed for routing and billing. | |
| NANPA relief planning status and NPAs exhausting in 36 months | relief plans, new codes, approved dates | Oct 24, 2026 | 6a9027de32855198fd46f6b9dd0c31a771a0b84850f2a10aec097da1d60516b5 | Same as above. | |
| NANPA NPA Exhaust Analysis (NRUF) | exhaust forecasts | April 2026 edition | Oct 24, 2026 | fdccdb419f9bd0c1960d5ea32ef3e0d7f6ab3d26f94ff0f4a66cc6086e3cd84b | Same as above. |
| Canadian Numbering Administrator: CO code status (all NPAs) | Canadian prefixes, exchange areas, holders | Oct 24, 2026 | 6575d17d77722f658e472a8aafe303b0fdbf15389728b523cf702823601a8636 | CNAC website terms (version 1, 2020) permit lawful use; data used with attribution. | |
| FTC Do Not Call Reported Calls data (daily files) | complaints by caller ID area code, subjects, robocall flag, consumer state | Oct 24, 2026 | — | U.S. government work. Complaints are unverified; we print only totals by area code. | |
| FCC Consumer Complaints data (CGB, unwanted calls) | unwanted-call complaints by caller ID area code | Oct 24, 2026 | 65c7edfc742555b7fd5d1ff68a140d9379513628047411a3162eb91fb9610727 | Public Domain U.S. Government. | |
| U.S. Census Bureau Gazetteer 2024, places | place names and coordinates | annual | Oct 24, 2026 | cf262fc92b2326f7a8c62a89d156a60eb17d64d6d35f7a62310c43bb08972c06 | U.S. government work. |
| U.S. Census Bureau 2020 FIPS place codes with counties | counties of places | annual | Oct 24, 2026 | 302ff3cf031217aca032d89f42c0dd93611a76d72ab2036944fa40d5c23c6613 | U.S. government work. |
Not used: the toll-free number registry (access is limited to its members), LERG and number portability databases (licensed), Wikipedia text, user reviews and people-search data.