NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/22/2026
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 878
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-01-17 | 878-250-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | CRIDERSCOR | PA |
| 2023-01-11 | 878-266-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | ELDERTON | PA |
| 2023-01-09 | 878-250-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | CRIDERSCOR | PA |
| 2022-12-09 | 878-677-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | NEWWLMNGTN | PA |
| 2022-08-18 | 878-261-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | FREEPORT | PA |
| 2022-07-28 | 878-256-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PTTSBGZON1 | PA |
| 2022-06-02 | 878-256-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PTTSBGZON1 | PA |
| 2022-05-18 | 878-256-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PTTSBGZON1 | PA |
| 2022-05-06 | 878-268-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | IMPERIAL | PA |
| 2021-08-23 | 878-599-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | PTGSBNZN14 | PA |
| 2021-01-26 | 878-837-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | BENTLEYVL | PA |
| 2014-03-14 | 878-332-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - PA | 7315 | WEXFORD | PA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.