NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-07-16 941-867 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SARASOTA FL
2020-07-16 980-317 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 DAVIDSON NC
2020-07-15 240-733 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ASHTON236 MD
2020-07-15 240-922 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WSNGTNZN11 MD
2020-07-15 253-339 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2020-07-15 309-718 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → STRATUS NETWORKS 495J BLOOMINGTN IL
2020-07-15 318-739 0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F MANSURA LA
2020-07-15 423-873 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H STONEY CRK TN
2020-07-15 423-922 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H BAILEYTON TN
2020-07-15 423-955 0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H WHITWELL TN
2020-07-15 423-966 1XXX2XXX5XXX6XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BALL PLAY TN
2020-07-15 475-274 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2020-07-15 475-285 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F NAUGATUCK CT
2020-07-15 479-390 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C ALTUS AR
2020-07-15 501-437 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F LONOKE AR
2020-07-15 501-577 0XXX1XXX2XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H LONOKE AR
2020-07-15 501-599 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SYVNHLSHWD AR
2020-07-15 501-755 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H QUITMAN AR
2020-07-15 501-799 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H PALARM AR
2020-07-15 539-766 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BROKENARRW OK
2020-07-15 629-348 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H FAIRVIEW TN
2020-07-15 629-758 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H DICKSON TN
2020-07-15 667-577 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ELKTON MD
2020-07-15 667-688 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H PARKVILLE MD
2020-07-15 667-758 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H SILVER RUN MD
2020-07-15 667-842 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H WOODLAWN MD
2020-07-15 731-529 0XXX1XXX3XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H MICHIE TN
2020-07-15 743-215 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E WALNUTCOVE NC
2020-07-15 901-588 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H MASON TN
2020-07-15 901-699 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H COVINGTON TN
2020-07-15 901-799 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H COLLIERVL TN
2020-07-15 901-899 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H MOSCOW TN
2020-07-15 901-955 5XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H ROSEMARK TN
2020-07-15 931-345 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H SPARTA TN
2020-07-15 931-465 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WINCHESTER TN
2020-07-15 931-500 0XXX1XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H SUMMERTOWN TN
2020-07-15 931-977 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H CLIFTON TN
2020-07-14 224-346 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H LAKE VILLA IL
2020-07-14 224-689 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ELGIN IL
2020-07-14 224-744 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FRANKLINPK IL
2020-07-14 224-899 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H WHEELING IL
2020-07-14 224-922 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GLENCOE IL
2020-07-14 224-955 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ROSELLE IL
2020-07-14 253-900 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H GIG HARBOR WA
2020-07-14 309-709 1XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → STRATUS NETWORKS 495J MANITO IL
2020-07-14 320-946 0XXX3XXX · 2 holders which blocks → FRACTEL, LLC 965H SACREDHERT MN
2020-07-14 331-867 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H YORKVILLE IL
2020-07-14 331-946 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GLEN ELLYN IL
2020-07-14 425-666 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H EVERETT WA
2020-07-14 425-900 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BELLEVUE WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.