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
2016-12-21 406-831 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H BILLINGS MT
2016-12-21 605-305 0–9 XXXall 10 · 8 holders which blocks → TELNYX LLC 073H SIOUX FLS SD
2016-12-21 619-745 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 CHULAVISTA CA
2016-12-21 769-246 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H JACKSON MS
2016-12-20 205-860 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 TUSCALOOSA AL
2016-12-20 236-701 not yet reported which blocks → Iristel Inc. 154E Midway —
2016-12-20 236-837 not yet reported which blocks → Iristel Inc. 154E Revelstoke —
2016-12-20 346-413 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2016-12-20 431-886 not yet reported which blocks → Westman Media Cooperative Ltd 120F Melita —
2016-12-20 431-889 not yet reported which blocks → Westman Media Cooperative Ltd 120F Deloraine —
2016-12-20 478-259 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MACON GA
2016-12-20 579-642 not yet reported which blocks → Videotron Ltd. 8306 Mirabel-Aeroport —
2016-12-20 720-758 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J DENVER CO
2016-12-20 825-250 not yet reported which blocks → Iristel Inc. 154E High Level —
2016-12-20 825-251 not yet reported which blocks → Iristel Inc. 154E Slave Lake —
2016-12-20 873-869 not yet reported which blocks → Videotron Ltd. 8306 Val-D'Or —
2016-12-20 904-947 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSONVL FL
2016-12-19 216-414 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 CLEVELAND OH
2016-12-19 352-667 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BROOKSVL FL
2016-12-19 562-588 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ALAMITOS CA
2016-12-19 580-769 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C SAYRE OK
2016-12-19 720-718 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9636 LONGMONT CO
2016-12-19 786-654 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NORTH DADE FL
2016-12-19 816-319 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H EXCELSRSPG MO
2016-12-19 865-507 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KNOXVILLE TN
2016-12-19 901-713 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MEMPHIS TN
2016-12-19 937-200 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 FAIRBORN OH
2016-12-19 951-783 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K RIVERSIDE CA
2016-12-16 470-356 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NW GA
2016-12-16 470-515 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NW GA
2016-12-16 803-722 0–9 XXXall 10 · 3 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 COLUMBIA SC
2016-12-16 803-989 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 AIKEN SC
2016-12-16 808-762 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - HI 9414 HONOLULU HI
2016-12-16 864-775 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 GREENVILLE SC
2016-12-16 980-556 0–9 XXXall 10 · 5 holders which blocks → SOUTH CAROLINA NET, INC. - NC 511C CHARLOTTE NC
2016-12-15 205-864 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2016-12-15 209-308 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H MERCED CA
2016-12-15 407-723 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D ORLANDO FL
2016-12-15 424-414 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H INGLEWOOD CA
2016-12-15 442-515 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H SAN MARCOS CA
2016-12-15 505-494 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H ALBUQURQUE NM
2016-12-15 516-309 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 NASSAUZN02 NY
2016-12-15 530-399 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H CHICO CA
2016-12-15 559-409 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H VISALIA CA
2016-12-15 612-540 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2016-12-15 620-407 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - KS 7593 MEADE KS
2016-12-15 628-209 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H NOVATO CA
2016-12-15 661-404 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H BKFD MAIN CA
2016-12-15 831-230 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H MONTEREY CA
2016-12-15 848-249 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 FARMINGDL NJ

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.