NumberResearchThousands-blocks in 937-558
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 937-558 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 937 blocks
Most active assignees, all time — NPA 937
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 937-558-0XXX | 0000–0999 | Reserved | PAETEC ITEL, LLC | 829J | DAYTON | OH |
| — | 937-558-1XXX | 1000–1999 | Reserved | PAETEC ITEL, LLC | 829J | DAYTON | OH |
| 2026-01-12 | 937-558-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DAYTON | OH |
| — | 937-558-3XXX | 3000–3999 | Reserved | LEVEL 3 TELECOM OF OHIO, LLC - OH | 7460 | DAYTON | OH |
| — | 937-558-4XXX | 4000–4999 | Reserved | LEVEL 3 TELECOM OF OHIO, LLC - OH | 7460 | DAYTON | OH |
| — | 937-558-5XXX | 5000–5999 | Reserved | PAETEC ITEL, LLC | 829J | DAYTON | OH |
| 2008-08-19 | 937-558-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | DAYTON | OH |
| — | 937-558-7XXX | 7000–7999 | Reserved | PAETEC ITEL, LLC | 829J | DAYTON | OH |
| 2008-08-19 | 937-558-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | DAYTON | OH |
| — | 937-558-9XXX | 9000–9999 | Reserved | PAETEC ITEL, LLC | 829J | DAYTON | 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.