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
2017-03-31 873-505 not yet reported which blocks → Iristel Inc. 154E Kangiqsujuaq —
2017-03-30 337-282 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C GUEYDAN LA
2017-03-30 385-274 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H MIDVALE UT
2017-03-30 517-275 0–9 XXXall 10 · 5 holders which blocks → WIRETAP TELECOM, LLC. 733J LANSING MI
2017-03-30 605-740 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SIOUX FLS SD
2017-03-30 639-219 not yet reported which blocks → Bell West Inc. 2933 Weyburn —
2017-03-30 825-252 not yet reported which blocks → Iristel Inc. 154E Calgary —
2017-03-30 825-253 not yet reported which blocks → Iristel Inc. 154E Calgary —
2017-03-30 825-500 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2017-03-30 825-600 not yet reported which blocks → Iristel Inc. 154E Edmonton —
2017-03-29 209-672 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MODESTO CA
2017-03-29 213-432 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 10 CA
2017-03-29 253-331 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 TACOMAWVLY WA
2017-03-29 323-914 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 MONTEBELLO CA
2017-03-29 442-218 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LKISABELLA CA
2017-03-29 515-531 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GRANGER IA
2017-03-29 585-867 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H ROCHESTER NY
2017-03-29 619-909 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H SNDG SNDG CA
2017-03-29 737-217 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AUSTIN TX
2017-03-29 778-702 not yet reported which blocks → TELUS 8086 Terrace —
2017-03-29 778-703 not yet reported which blocks → TELUS 8086 Victoria —
2017-03-29 778-705 not yet reported which blocks → TELUS 8086 Fort Langley —
2017-03-29 916-831 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ELK GROVE CA
2017-03-28 318-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2017-03-28 346-255 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 CHANNELVW TX
2017-03-28 346-420 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 SUGAR LAND TX
2017-03-28 385-264 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OGDEN UT
2017-03-28 385-278 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J KAYSVILLE UT
2017-03-28 385-484 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LEHI UT
2017-03-28 407-755 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINTERPARK FL
2017-03-28 539-210 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H PRYOR OK
2017-03-28 539-345 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELNYX LLC 073H GROVE OK
2017-03-28 606-370 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - KY 896E CRAB ORCH KY
2017-03-28 631-640 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 AMITYVILLE NY
2017-03-28 813-461 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPANTH FL
2017-03-28 813-492 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPAWST FL
2017-03-28 904-932 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 ORANGEPARK FL
2017-03-28 929-452 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN03 NY
2017-03-27 346-246 0–9 XXXall 10 · 6 holders which blocks → SOUTHWESTERN BELL 9533 TOMBALL TX
2017-03-27 346-249 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2017-03-27 430-239 0–9 XXXall 10 · 4 holders which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 REDWATER TX
2017-03-27 442-292 0–9 XXXall 10 · 7 holders which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 VTVL APVY CA
2017-03-27 504-635 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
2017-03-27 504-882 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H JESUITBEND LA
2017-03-27 618-484 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H COLLINSVL IL
2017-03-27 667-226 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D STMICHAELS MD
2017-03-27 667-291 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MD 876D MILLINGTON MD
2017-03-27 682-477 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 GRAPEVINE TX
2017-03-27 682-509 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 ARLINGTON TX
2017-03-27 804-923 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 RICHMOND VA

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.