You are reviewing the Area Code (NPA/NXX) report for 551-423. Did you mean to search the SMS short code 551423?
Paste raw digits, a formatted phone number, an area code, an NPA-NXX block, or a short code. US and Canada phone lookups route automatically, and international iMessage checks are available separately.
| Raw Number | 551423 |
| Basic Format | 551-423 |
| NPA (Area Code) | 551 |
| NXX | 423 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | City | State | Region | Block Effective Date | Block Available Date |
|---|---|---|---|---|---|---|---|---|---|---|
| 551-423-0XXX | 637C | ONVOY, LLC - NJ | HACKENSACK | AS | 10/02/2025 | HACKENSACK | NJ | MA | 10/26/2025 | |
| 551-423-1XXX | 637C | ONVOY, LLC - NJ | HACKENSACK | AS | 10/02/2025 | HACKENSACK | NJ | MA | 10/26/2025 | |
| 551-423-2XXX | 4036 | NEW CINGULAR WIRELESS PCS, LLC - DC | HACKENSACK | AF | HACKENSACK | NJ | MA | 07/21/2026 | ||
| 551-423-3XXX | 4036 | NEW CINGULAR WIRELESS PCS, LLC - DC | HACKENSACK | AF | HACKENSACK | NJ | MA | 07/27/2026 | ||
| 551-423-4XXX | 490J | BOOST SUBSCRIBERCO L.L.C. | HACKENSACK | AS | 08/20/2025 | HACKENSACK | NJ | MA | 01/26/2026 | |
| 551-423-5XXX | 321J | HD CARRIER LLC | HACKENSACK | AS | 11/12/2025 | HACKENSACK | NJ | MA | 12/11/2025 | |
| 551-423-6XXX | 321J | HD CARRIER LLC | HACKENSACK | AS | 11/12/2025 | HACKENSACK | NJ | MA | 12/11/2025 | |
| 551-423-7XXX | 321J | HD CARRIER LLC | HACKENSACK | AS | 11/12/2025 | HACKENSACK | NJ | MA | 12/11/2025 | |
| 551-423-8XXX | 4036 | NEW CINGULAR WIRELESS PCS, LLC - DC | HACKENSACK | AS | 05/20/2025 | HACKENSACK | NJ | MA | 07/04/2025 | |
| 551-423-9XXX | 4036 | NEW CINGULAR WIRELESS PCS, LLC - DC | HACKENSACK | AS | 05/20/2025 | HACKENSACK | NJ | MA | 07/04/2025 | |
| 551-423-XXXX | 4036 | NEW CINGULAR WIRELESS PCS, LLC - DC | HACKENSACK | AS | 05/20/2025 | HACKENSACK | NJ |
Reports