NumberResearchRecent thousands-block assignments
47 blocks assigned in the last 30 days · 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, last 30 days
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| Assigned | Block | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 978-517-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AMESBURY | MA | |
| 978-517-4XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AMESBURY | MA | |
| 978-517-5XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AMESBURY | MA | |
| 978-606-0XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOWELL | MA | |
| 978-606-2XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOWELL | MA | |
| 978-639-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUDBURY | MA | |
| 978-639-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUDBURY | MA | |
| 978-655-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAWRENCE | MA | |
| 978-716-1XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DANVERS | MA | |
| 978-737-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WILMINGTON | MA | |
| 978-763-9XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HUDSON | MA | |
| 978-901-6XXX | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BILLERICA | MA |
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.