NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/24/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 937
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2012-11-02 | 937-481-9XXX | 9000–9999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | WILMINGTON | OH |
| 2012-11-02 | 937-506-1XXX | 1000–1999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | TIPP CITY | OH |
| 2012-11-02 | 937-540-3XXX | 3000–3999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | ENGLEWOOD | OH |
| 2012-11-02 | 937-715-3XXX | 3000–3999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | TROTWOOD | OH |
| 2012-09-12 | 937-247-7XXX | 7000–7999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | MSBGWCRLTN | OH |
| 2012-09-12 | 937-280-7XXX | 7000–7999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | VANDALIA | OH |
| 2012-09-12 | 937-343-7XXX | 7000–7999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | FAIRBORN | OH |
| 2012-09-12 | 937-350-9XXX | 9000–9999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | CENTERVLLE | OH |
| 2012-09-12 | 937-352-7XXX | 7000–7999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | XENIA | OH |
| 2012-09-12 | 937-504-0XXX | 0000–0999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | SPRINGFLD | OH |
| 2012-09-12 | 937-550-7XXX | 7000–7999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | FRANKLIN | OH |
| 2012-09-12 | 937-702-0XXX | 0000–0999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | BEAVERCREK | OH |
| 2012-09-12 | 937-709-1XXX | 1000–1999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | BELLBROOK | OH |
| 2010-12-20 | 937-999-0XXX | 0000–0999 | Assigned | CINBELL EXT TERR LLC DBA ALTAFIBER CONNECTED SVCS | 600F | DAYTON | OH |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.