NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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, all time — NPA 646
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-06-12 | 646-404-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2006-03-02 | 646-314-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2006-03-02 | 646-314-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2006-03-02 | 646-314-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2006-03-02 | 646-393-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2006-02-23 | 646-402-0XXX | 0000–0999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2006-02-23 | 646-402-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2005-12-27 | 646-764-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2005-04-19 | 646-393-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2005-02-14 | 646-401-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2005-02-14 | 646-401-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2005-02-14 | 646-401-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2005-02-14 | 646-401-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2005-02-14 | 646-401-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-11-29 | 646-330-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-11-29 | 646-463-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-11-29 | 646-463-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-11-29 | 646-463-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-11-29 | 646-463-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-11-29 | 646-542-5XXX | 5000–5999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-11-29 | 646-542-6XXX | 6000–6999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-11-29 | 646-764-8XXX | 8000–8999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-07-16 | 646-670-9XXX | 9000–9999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
| 2004-05-24 | 646-670-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | NWYRCYZN01 | NY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.