NumberResearchRecent thousands-block assignments
1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 — NPA 513
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2003-07-24 | 513-330-7XXX | 7000–7999 | Assigned | CITYNET OHIO, LLC - OH | 036B | HAMILTON | OH |
| 2003-07-24 | 513-340-7XXX | 7000–7999 | Assigned | CITYNET OHIO, LLC - OH | 036B | LTL MIAMI | OH |
| 2003-07-24 | 513-342-7XXX | 7000–7999 | Assigned | CITYNET OHIO, LLC - OH | 036B | BETHANY | OH |
| 2003-07-15 | 513-201-3XXX | 3000–3999 | Assigned | ONVOY, LLC - OH | 464C | CLERMONT | OH |
| 2003-07-15 | 513-229-9XXX | 9000–9999 | Assigned | ONVOY, LLC - OH | 464C | MASON | OH |
| 2003-07-15 | 513-274-2XXX | 2000–2999 | Assigned | ONVOY, LLC - OH | 464C | LTL MIAMI | OH |
| 2003-07-15 | 513-275-0XXX | 0000–0999 | Assigned | ONVOY, LLC - OH | 464C | HAMILTON | OH |
| 2003-07-15 | 513-282-1XXX | 1000–1999 | Assigned | ONVOY, LLC - OH | 464C | LEBANON | OH |
| 2003-07-15 | 513-298-2XXX | 2000–2999 | Assigned | ONVOY, LLC - OH | 464C | BETHANY | OH |
| 2003-07-11 | 513-371-5XXX | 5000–5999 | Assigned | ONVOY, LLC - OH | 464C | CINCINNATI | OH |
| 2003-06-25 | 513-322-7XXX | 7000–7999 | Assigned | CITYNET OHIO, LLC - OH | 036B | CINCINNATI | OH |
| 2003-06-24 | 513-233-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH | 7836 | CINCINNATI | OH |
| 2003-06-17 | 513-233-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH |
| 2003-06-17 | 513-233-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH |
| 2003-05-21 | 513-240-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | CINCINNATI | OH |
| — | 513-299-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | SEVEN MILE | OH |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.