NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 717-507 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LEBANON | PA |
| — | 717-517 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LANCASTER | PA |
| — | 717-571 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-578 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| — | 717-579 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-586 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| — | 717-602 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-649 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-659 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| — | 717-669 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LANCASTER | PA |
| — | 717-679 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LEBANON | PA |
| — | 717-683 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| — | 717-805 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-808 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LANCASTER | PA |
| — | 717-816 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CHAMBERSBG | PA |
| — | 717-829 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-856 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-860 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CHAMBERSBG | PA |
| — | 717-877 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-880 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| — | 717-887 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| — | 717-891 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | YORK | PA |
| — | 717-903 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-940 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LANCASTER | PA |
| — | 717-951 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LANCASTER | PA |
| — | 717-979 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HARISBGZN1 | PA |
| — | 717-994 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LEWISTOWN | PA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.