NumberResearchThousands-blocks in 657-284
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 657-284 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 657 blocks
Most active assignees, all time — NPA 657
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-07-30 | 657-284-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ORANGE | CA |
| 2015-07-30 | 657-284-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ORANGE | CA |
| 2015-08-10 | 657-284-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ORANGE | CA |
| 2015-08-13 | 657-284-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ORANGE | CA |
| 2015-08-13 | 657-284-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ORANGE | CA |
| 2015-08-06 | 657-284-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORANGE | CA |
| 2015-08-06 | 657-284-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ORANGE | CA |
| 2016-06-28 | 657-284-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | ORANGE | CA |
| 2016-05-09 | 657-284-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | ORANGE | CA |
| 2016-07-19 | 657-284-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ORANGE | CA |
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.