NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2019-03-19 619-932 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CHULAVISTA CA
2019-03-19 626-567 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H PSDN PSDN CA
2019-03-19 628-288 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MILLVALLEY CA
2019-03-19 628-336 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SAN RAFAEL CA
2019-03-19 628-628 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNFC CNTRL CA
2019-03-19 628-758 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SNFC MT-EV CA
2019-03-19 650-699 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SAN MATEO CA
2019-03-19 650-788 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PALO ALTO CA
2019-03-19 661-566 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PLDL PLDL CA
2019-03-19 669-699 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNJS SOUTH CA
2019-03-19 705-289 not yet reported which blocks → Videotron Ltd. 383F Lindsay —
2019-03-19 726-900 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J SANANTONIO TX
2019-03-19 737-900 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J AUSTIN TX
2019-03-19 754-837 0–9 XXXall 10 · 6 holders which blocks → CORETEL FLORIDA, INC. - FL 481F HOLLYWOOD FL
2019-03-19 830-932 0XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K KNIPPA TX
2019-03-19 838-208 0XXX2XXX9XXX · 2 holders which blocks → CSC WIRELESS, LLC 425J COPAKE NY
2019-03-19 858-388 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H EL CAJON CA
2019-03-19 858-585 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LA MESA CA
2019-03-19 858-788 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LA JOLLA CA
2019-03-19 858-988 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNDG SNDG CA
2019-03-19 937-800 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J DAYTON OH
2019-03-19 980-900 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J CHARLOTTE NC
2019-03-19 984-305 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GOLDSBORO NC
2019-03-19 984-900 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J RALEIGH NC
2019-03-18 202-410 0–9 XXXwhole prefix which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2019-03-18 209-618 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MODESTO CA
2019-03-18 224-285 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DEERFIELD IL
2019-03-18 380-800 0–9 XXXall 10 · 3 holders which blocks → INVOXIO INCORPORATED 158H COLUMBUS OH
2019-03-18 409-666 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H GALVESTON TX
2019-03-18 540-475 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J NARROWS VA
2019-03-18 681-271 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WV 077G MOOREFIELD WV
2019-03-18 774-384 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MIDDLEBORO MA
2019-03-18 845-715 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J ELIZAVILLE NY
2019-03-18 856-403 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J CAMDEN NJ
2019-03-18 878-837 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BENTLEYVL PA
2019-03-18 910-801 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTH CAROLINA NET, INC. - NC 511C ELIZABTHTN NC
2019-03-15 219-348 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H WHITING IN
2019-03-15 219-356 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CROWNPOINT IN
2019-03-15 562-414 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D DOWNEY CA
2019-03-15 571-400 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J WSNGTNZN08 VA
2019-03-15 571-440 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 LEESBURG VA
2019-03-15 574-600 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CULVER IN
2019-03-15 626-501 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D EL MONTE CA
2019-03-15 629-234 0–9 XXXall 10 · 8 holders which blocks → FRACTEL, LLC 965H GOODLETSVL TN
2019-03-15 629-465 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H SOFREDONIA TN
2019-03-15 629-500 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H GREENBRIER TN
2019-03-15 629-529 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H NOLENSVL TN
2019-03-15 782-388 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Halifax —
2019-03-15 782-588 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Halifax —
2019-03-15 782-688 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Halifax —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.