NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-04-14 557-201 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 KIRKWOOD MO
2023-04-14 564-236 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E VANCOUVER WA
2023-04-14 564-237 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2023-04-14 615-996 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J FRANKLIN TN
2023-04-14 707-907 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2023-04-14 762-353 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COLUMBUS GA
2023-04-14 808-570 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HONOLULU HI
2023-04-14 828-703 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MORGANTON NC
2023-04-14 870-472 0XXX1XXX2XXX3XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 NASHVILLE AR
2023-04-14 904-896 0–9 XXXwhole prefix which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 FERNADNBCH FL
2023-04-14 920-870 0XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SHEBOGNFLS WI
2023-04-13 385-530 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-04-13 605-518 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J SIOUX FLS SD
2023-04-13 667-431 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 ARBUTUS MD
2023-04-13 802-480 0XXX1XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H BARRE VT
2023-04-13 826-223 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → COMMIO, LLC 939H HARRISONBG VA
2023-04-13 840-227 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2023-04-12 213-659 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 09 CA
2023-04-12 279-236 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C RSVL MAIN CA
2023-04-12 341-230 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C RICHMOND CA
2023-04-12 424-850 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H EL SEGUNDO CA
2023-04-12 442-397 0–9 XXXall 10 · 3 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L PALMDESERT CA
2023-04-12 442-421 4XXX5XXX which blocks → ONVOY SPECTRUM, LLC 624H LKISABELLA CA
2023-04-12 442-425 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H VICTORVL CA
2023-04-12 442-426 0XXX2XXX4XXX5XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H WRIGHTWOOD CA
2023-04-12 442-445 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H BISHOP CA
2023-04-12 442-447 0XXX1XXX2XXX4XXX5XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BORON CA
2023-04-12 442-448 4XXX5XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H LENWOOD CA
2023-04-12 464-214 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2023-04-12 507-908 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANKATO MN
2023-04-12 531-317 0XXX1XXX3XXX5XXX · 3 holders which blocks → ONVOY, LLC - NE 549E HALLAM NE
2023-04-12 531-318 0XXX1XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NE 549E WILBER NE
2023-04-12 531-319 0XXX1XXX2XXX · 2 holders which blocks → ONVOY, LLC - NE 549E DAVENPORT NE
2023-04-12 531-320 0XXX1XXX4XXX · 2 holders which blocks → ONVOY, LLC - NE 549E GRAFTON NE
2023-04-12 531-323 0XXX1XXX5XXX · 2 holders which blocks → ONVOY, LLC - NE 549E JULIAN NE
2023-04-12 562-672 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H LA HABRA CA
2023-04-12 626-687 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SNGBLCNN CA
2023-04-12 661-605 0–9 XXXall 10 · 2 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L BKFD MAIN CA
2023-04-12 661-608 6XXX7XXX which blocks → ONVOY SPECTRUM, LLC 624H HI VISTA CA
2023-04-12 661-730 6XXX7XXX which blocks → ONVOY SPECTRUM, LLC 624H PLDL AGDL CA
2023-04-12 701-517 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J GRANDFORKS ND
2023-04-12 714-419 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PLACENTIA CA
2023-04-12 747-850 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BRBN SNVY CA
2023-04-12 775-512 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J RENO NV
2023-04-12 779-790 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H STERLING IL
2023-04-12 820-850 0XXX1XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H FILLMORE CA
2023-04-12 930-310 0XXX which blocks → COMMIO, LLC 939H TERREHAUTE IN
2023-04-12 949-850 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H IRVINE CA
2023-04-12 951-952 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BANNING CA
2023-04-12 951-953 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SUN CITY CA

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.