NumberResearchRecent prefix assignments
1 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 |
|---|---|---|---|---|---|---|
| — | 401-921 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | COMCAST IP PHONE, LLC | 318J | WARWICK | RI |
| — | 401-922 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | W WARWICK | RI |
| — | 401-924 | 7XXX9XXX · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PORTSMOUTH | RI |
| — | 401-932 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | NARRAGNSTT | RI |
| — | 401-933 | not yet reported which blocks → | SPOK, INC. | 6630 | PROVIDENCE | RI |
| — | 401-934 | 6XXX8XXX · 2 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | SCITUATE | RI |
| — | 401-935 | not yet reported which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PROVIDENCE | RI |
| — | 401-937 | 9XXX which blocks → | PEERLESS NETWORK OF RHODE ISLAND, LLC - RI | 631G | WOONSOCKET | RI |
| — | 401-938 | not yet reported which blocks → | SPOK, INC. | 6630 | PROVIDENCE | RI |
| — | 401-940 | not yet reported which blocks → | RI | |||
| — | 401-941 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | PROVIDENCE | RI |
| — | 401-942 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | PROVIDENCE | RI |
| — | 401-943 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | PROVIDENCE | RI |
| — | 401-944 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | PROVIDENCE | RI |
| — | 401-946 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | PROVIDENCE | RI |
| — | 401-949 | 6XXX which blocks → | VERIZON NEW ENGLAND INC. | 9102 | CENTREDALE | RI |
| — | 401-950 | not yet reported which blocks → | RI | |||
| — | 401-952 | none assigned yet which blocks → | METROPCS, INC. | 5562 | PROVIDENCE | RI |
| — | 401-954 | none assigned yet which blocks → | METROPCS, INC. | 5562 | PROVIDENCE | RI |
| — | 401-958 | not yet reported which blocks → | RI | |||
| — | 401-959 | not yet reported which blocks → | RI | |||
| — | 401-960 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | XXXXXXXXXX | RI |
| — | 401-968 | 4XXX7XXX8XXX · 3 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | WGLOCESTER | RI |
| — | 401-970 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | XXXXXXXXXX | RI |
| — | 401-976 | not yet reported which blocks → | RI | |||
| — | 401-986 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | XXXXXXXXXX | RI |
| — | 401-987 | not yet reported which blocks → | VERIZON NEW ENGLAND INC. | 9102 | XXXXXXXXXX | RI |
| — | 401-988 | not yet reported which blocks → | RI | |||
| — | 401-992 | 2XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | WGLOCESTER | RI |
| — | 401-996 | not yet reported which blocks → | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | PROVIDENCE | RI |
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.