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
2023-04-19 506-742 not yet reported which blocks → Bell Mobility Aliant 329A Saint John —
2023-04-19 506-951 not yet reported which blocks → Bell Mobility Aliant 329A Moncton —
2023-04-19 564-241 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CAMAS WA
2023-04-19 672-654 not yet reported which blocks → Fibernetics Corporation 464D Saanich —
2023-04-19 672-655 not yet reported which blocks → Fibernetics Corporation 464D Fulford Harbour —
2023-04-19 689-309 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 WINTERPARK FL
2023-04-19 727-624 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLEARWATER FL
2023-04-19 769-306 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J VICKSBURG MS
2023-04-19 838-270 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TROY NY
2023-04-19 912-710 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SAVANNAH GA
2023-04-19 929-676 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2023-04-19 929-679 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2023-04-19 929-680 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN12 NY
2023-04-19 937-517 1XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K SINKINGSPG OH
2023-04-19 956-828 0–9 XXXall 10 · 3 holders which blocks → STPCS JOINT VENTURE, LLC 4290 MCALLEN TX
2023-04-18 225-515 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J BATONROUGE LA
2023-04-18 251-710 0XXX1XXX2XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - AL 604E ATMORE AL
2023-04-18 269-239 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BATTLE CRK MI
2023-04-18 331-296 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WHEATON IL
2023-04-18 350-209 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VALLEY SPG CA
2023-04-18 352-806 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DADE CITY FL
2023-04-18 404-716 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2023-04-18 437-439 not yet reported which blocks → Bell Mobility 6574 Toronto —
2023-04-18 448-850 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - FL 937C GREENVILLE FL
2023-04-18 458-302 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MEDFORD OR
2023-04-18 520-677 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CASAGRANDE AZ
2023-04-18 530-939 9XXX which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NOSAN JUAN CA
2023-04-18 564-239 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LONGVIEW WA
2023-04-18 572-217 0XXX1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKARCHE OK
2023-04-18 623-307 0–9 XXXall 10 · 4 holders which blocks → ALLO COMMUNICATIONS LLC 907K PHOENIX AZ
2023-04-18 651-506 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J STILLWATER MN
2023-04-18 672-652 not yet reported which blocks → Fibernetics Corporation 464D Victoria —
2023-04-18 672-653 not yet reported which blocks → Fibernetics Corporation 464D Sooke —
2023-04-18 779-370 0XXX1XXX8XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ROCKFORD IL
2023-04-18 839-240 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CHESTER SC
2023-04-18 840-229 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CLAREMONT CA
2023-04-18 938-208 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CULLMAN AL
2023-04-18 947-246 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MI
2023-04-18 989-247 1XXX which blocks → COMCAST IP PHONE, LLC 318J PIGEON MI
2023-04-17 346-641 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEER PARK TX
2023-04-17 725-298 0–9 XXXall 10 · 3 holders which blocks → PEERINGHUB, INC. 429K LAS VEGAS NV
2023-04-17 840-228 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COLTON CA
2023-04-17 912-708 2XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 SOPERTON GA
2023-04-14 218-621 3XXX which blocks → PAUL BUNYAN RURAL TELEPHONE COOP. 4814 PALISADE MN
2023-04-14 229-590 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VALDOSTA GA
2023-04-14 253-379 1XXX7XXX · 2 holders which blocks → ONVOY, LLC - WA 483E ROY WA
2023-04-14 307-289 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J CHEYENNE WY
2023-04-14 425-476 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WA 483E BOTHELL WA
2023-04-14 472-217 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROCKINGHAM NC
2023-04-14 520-675 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TUCSON AZ

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.