NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
8X8, INC. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2023-03-28 561-920 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DELRAY BCH FL
2023-03-28 656-223 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TAMPANTH FL
2023-03-28 785-583 0XXX1XXX2XXX8XXX9XXX · 5 holders which blocks → NEX-TECH WIRELESS, LLC 122D COLBY KS
2023-03-28 785-585 0XXX2XXX8XXX · 3 holders which blocks → NEX-TECH WIRELESS, LLC 122D SMITH CTR KS
2023-03-28 826-221 0XXX2XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H GAINESBORO VA
2023-03-28 826-826 0XXX which blocks → ONVOY SPECTRUM, LLC 624H DAYTON VA
2023-03-28 828-770 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LEICESTER NC
2023-03-28 828-830 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H WEAVERVL NC
2023-03-28 828-840 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H MARION NC
2023-03-28 859-418 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J LEXINGTON KY
2023-03-28 943-404 0XXX1XXX4XXX5XXX9XXX · 4 holders which blocks → ONVOY, LLC - GA 067D ZEBULON GA
2023-03-28 943-470 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - GA 067D VILLA RICA GA
2023-03-28 943-678 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - GA 067D ADAIRSVL GA
2023-03-28 943-770 0XXX1XXX2XXX7XXX8XXX which blocks → ONVOY, LLC - GA 067D BOGARTSTHM GA
2023-03-28 948-210 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NRFOLKZON3 VA
2023-03-27 417-570 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BRANSON MO
2023-03-27 557-202 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ST LOUIS MO
2023-03-27 567-410 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MANSFIELD OH
2023-03-27 573-905 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J JEFFERSNCY MO
2023-03-27 683-707 not yet reported which blocks → ISP Telecom Inc. 4727 Pefferlaw —
2023-03-27 683-929 not yet reported which blocks → ISP Telecom Inc. 4727 Udora —
2023-03-27 753-478 not yet reported which blocks → ISP Telecom Inc. 4727 Avonmore —
2023-03-27 753-669 not yet reported which blocks → ISP Telecom Inc. 4727 Finch —
2023-03-27 753-901 not yet reported which blocks → ISP Telecom Inc. 4727 Glen Robertson —
2023-03-27 804-813 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 DAWN VA
2023-03-27 826-219 0XXX which blocks → ONVOY SPECTRUM, LLC 624H MCGAHEYSVL VA
2023-03-27 826-540 0XXX which blocks → ONVOY SPECTRUM, LLC 624H HINTON VA
2023-03-27 979-403 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBUS TX
2023-03-24 228-240 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J GULFPORT MS
2023-03-24 251-429 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J GRAND BAY AL
2023-03-24 256-994 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 DECATUR AL
2023-03-24 260-601 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D FORT WAYNE IN
2023-03-24 424-487 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN SNMN CA
2023-03-24 468-590 not yet reported which blocks → ISP Telecom Inc. 4727 St-Faustin —
2023-03-24 468-822 not yet reported which blocks → ISP Telecom Inc. 4727 Val David —
2023-03-24 657-669 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2023-03-24 771-324 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2023-03-24 771-325 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2023-03-24 771-326 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2023-03-24 771-327 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2023-03-24 771-328 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2023-03-24 845-937 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 FALLSBURG NY
2023-03-24 870-452 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J EL DORADO AR
2023-03-23 229-587 0XXX8XXX · 2 holders which blocks → PLANT TELENET, INC. - GA 841E LEESBURG GA
2023-03-23 279-737 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - CA 649C RSVL CTHT CA
2023-03-23 367-675 not yet reported which blocks → ISP Telecom Inc. 4727 Anse-St-Jean —
2023-03-23 367-987 not yet reported which blocks → ISP Telecom Inc. 4727 Jonquiere —
2023-03-23 468-327 not yet reported which blocks → ISP Telecom Inc. 4727 Nominingue —
2023-03-23 468-476 not yet reported which blocks → ISP Telecom Inc. 4727 St-Adolphe-D'Howard —
2023-03-23 470-982 0–9 XXXall 10 · 5 holders which blocks → ETC COMMUNICATIONS, L.L.C. - GA 205D CARTERSVL GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.