NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
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
2017-12-14 657-355 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2017-12-14 669-249 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SUNNYVALE CA
2017-12-14 817-630 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2017-12-14 878-221 0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BUTLER PA
2017-12-14 909-789 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ONTARIO CA
2017-12-13 225-390 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J GONZALES LA
2017-12-13 225-396 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J VACHERIE LA
2017-12-13 225-398 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J LUTCHER LA
2017-12-13 236-455 not yet reported which blocks → TELUS 8086 Vancouver —
2017-12-13 236-456 not yet reported which blocks → TELUS 8086 Cloverdale —
2017-12-13 385-465 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2017-12-13 539-221 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 HASKELL OK
2017-12-13 781-403 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DEDHAM MA
2017-12-13 806-582 9XXX which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 WELLINGTON TX
2017-12-13 806-583 0–9 XXXall 10 · 6 holders which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 TULIA TX
2017-12-13 806-593 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 ABERNATHY TX
2017-12-13 825-208 not yet reported which blocks → TELUS 8084 Fort Saskatchewan —
2017-12-13 825-209 not yet reported which blocks → TELUS 8084 Hardisty —
2017-12-13 929-928 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN13 NY
2017-12-12 352-420 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 GAINESVL FL
2017-12-12 539-244 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OK 409F OKMULGEE OK
2017-12-12 641-321 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 8 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MOUNT AYR IA
2017-12-12 707-608 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WINDSOR CA
2017-12-12 803-844 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - SC 548E NO AUGUSTA SC
2017-12-12 916-309 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 SCRM MAIN CA
2017-12-12 971-297 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2017-12-11 224-275 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2017-12-11 253-290 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2017-12-11 346-289 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 DICKINSON TX
2017-12-11 438-298 not yet reported which blocks → Iristel Inc. 154E Ste-Genevieve —
2017-12-11 541-717 0–9 XXXall 10 · 9 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BAKER OR
2017-12-11 579-486 not yet reported which blocks → Iristel Inc. 154E St-Eustache —
2017-12-11 615-709 0–9 XXXall 10 · 4 holders which blocks → NORTH CENTRAL COMMUNICATIONS, INC. - TN 656H CARTHAGE TN
2017-12-11 737-229 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-11 781-468 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 DEDHAM MA
2017-12-11 802-307 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELNYX LLC 073H BURLINGTON VT
2017-12-11 805-718 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EL RIO CA
2017-12-08 223-202 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 HERSHEY PA
2017-12-08 224-274 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 HALF DAY IL
2017-12-08 346-287 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2017-12-08 385-787 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2017-12-08 539-229 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 ARPELAR OK
2017-12-08 539-899 2XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 STUART OK
2017-12-08 551-218 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2017-12-08 580-691 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 CARTWRIGHT OK
2017-12-08 580-714 2XXX5XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 ACHILLE OK
2017-12-08 580-733 2XXX3XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 BOKCHITO OK
2017-12-08 580-942 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 COLBERT OK
2017-12-08 586-496 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ROSEVILLE MI
2017-12-08 614-938 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.