NumberResearchRecent thousands-block assignments
8 blocks assigned in October 2025 · from the daily NANPA thousands-block report, 09/18/2026
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, October 2025
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| Assigned | Block | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2025-10-28 | 223-303-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HANOVER | PA |
| 2025-10-28 | 272-334-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOCK HAVEN | PA |
| 2025-10-28 | 272-461-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WILLIAMSPT | PA |
| 2025-10-27 | 608-331-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLATTEVL | WI |
| 2025-10-22 | 412-846-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTTSBGZON1 | PA |
| 2025-10-22 | 412-846-3XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTTSBGZON1 | PA |
| 2025-10-08 | 518-315-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ALTAMONT | NY |
| 2025-10-02 | 440-697-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7443 | HILLCREST | OH |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.