NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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.

Most active assignees, last 30 days — NPA 774
NEW CINGULAR WIRELESS PCS, LLC - DC 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-03-17 774-747 1XXX2XXX7XXX8XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H ASSONET MA
2021-03-08 774-636 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ROCHESTER MA
2021-02-08 774-464 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BARNSTABLE MA
2021-02-01 774-459 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEWTR MA
2021-02-01 774-474 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - MA 892D HARWICH MA
2021-01-27 774-457 0XXX1XXX4XXX5XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MILLBURY MA
2021-01-11 774-456 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 FRAMINGHAM MA
2020-12-21 774-453 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BROCKTON MA
2020-12-18 774-665 2XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H NORTON MA
2020-12-14 774-448 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILFORD MA
2020-12-09 774-477 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WHITINSVL MA
2020-11-23 774-439 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BROCKTON MA
2020-11-23 774-445 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MARLBORO MA
2020-11-23 774-446 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SOUTHBDG MA
2020-10-07 774-438 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWBEDFORD MA
2020-09-08 774-436 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J WORCESTER MA
2020-08-27 774-433 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BARNSTABLE MA
2020-07-24 774-395 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 ROCHESTER MA
2020-06-23 774-431 0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 AUBURN MA
2020-06-16 774-771 1XXX2XXX3XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - MA 892D BREWSTER MA
2020-06-16 774-871 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - MA 892D OSTERVILLE MA
2020-05-15 774-544 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MA 892D WEBSTER MA
2020-05-13 774-779 1XXX2XXX3XXX5XXX6XXX · 3 holders which blocks → ONVOY, LLC - MA 892D MARION MA
2020-04-06 774-429 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRAMINGHAM MA
2020-03-23 774-428 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BROCKTON MA
2020-02-25 774-427 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 FRAMINGHAM MA
2020-02-14 774-382 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NANTUCKET MA
2019-12-24 774-422 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BROCKTON MA
2019-10-11 774-416 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRAMINGHAM MA
2019-10-07 774-403 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 4 holders which blocks → AIRUS, INC. - MA 428H MEDFIELD MA
2019-10-02 774-398 0–9 XXXall 10 · 2 holders which blocks → AIRUS, INC. - MA 428H BROCKTON MA
2019-09-30 774-397 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → AIRUS, INC. - MA 428H STURBRIDGE MA
2019-09-12 774-372 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MANSFIELD MA
2019-06-20 774-393 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SHREWSBURY MA
2019-06-18 774-391 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WALPOLE MA
2019-05-16 774-390 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SOUTHGATE MA
2019-05-14 774-389 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MA 892D WORCESTER MA
2019-05-13 774-399 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E WESTBORO MA
2019-03-18 774-384 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MIDDLEBORO MA
2018-12-31 774-380 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BRIDGEWTR MA
2018-09-25 774-379 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 FALL RIVER MA
2018-09-21 774-378 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TC SYSTEMS, INC. 7135 WRENTHAM MA
2018-09-04 774-376 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. 7135 CARVER MA
2018-08-28 774-375 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRAMINGHAM MA
2018-08-02 774-374 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MARLBORO MA
2018-06-06 774-362 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATTLEBORO MA
2018-04-23 774-359 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRAMINGHAM MA
2018-02-05 774-358 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MA 892D HARWICH MA
2017-11-15 774-356 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FRAMINGHAM MA
2017-09-13 774-355 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J BUZZARDSBY MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.