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
2017-10-30 785-390 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J JUNCTIONCY KS
2017-10-30 873-288 not yet reported which blocks → Fido Solutions Inc. 5643 Ottawa-Hull —
2017-10-30 873-688 not yet reported which blocks → Fido Solutions Inc. 5643 Ottawa-Hull —
2017-10-27 226-501 not yet reported which blocks → Videotron Ltd. 383F Guelph —
2017-10-27 531-214 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - NE 549E PILGER NE
2017-10-27 574-338 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ELKHART IN
2017-10-27 720-527 0–9 XXXall 10 · 2 holders which blocks → TELIAX, INC. - CO 567G DENVER CO
2017-10-27 737-224 0–9 XXXall 10 · 4 holders which blocks → AUSTIN BESTLINE COMPANY 7551 AUSTIN TX
2017-10-27 857-322 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J EASTBOSTON MA
2017-10-26 249-216 not yet reported which blocks → TELUS Integrated Communications 2782 Huntsville —
2017-10-26 260-253 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D MARKLE IN
2017-10-26 260-254 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D POKAGON IN
2017-10-26 458-233 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 TELECOM OF OREGON, LLC - OR 7537 ALBANY OR
2017-10-26 548-898 not yet reported which blocks → TELUS Integrated Communications 2782 Kitchener-Waterloo —
2017-10-26 628-259 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 IGNACIO CA
2017-10-26 806-415 7XXX which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHANNING TX
2017-10-26 806-501 7XXX which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BOYS RANCH TX
2017-10-26 806-504 0XXX7XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ADRIAN TX
2017-10-26 806-505 5XXX7XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ESTELLINE TX
2017-10-26 806-506 0XXX7XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J DODSON TX
2017-10-26 806-514 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HARTLEY TX
2017-10-26 806-519 0XXX7XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LAKEVIEW TX
2017-10-26 806-526 7XXX which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GROOM TX
2017-10-26 806-529 3XXX7XXX9XXX · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WILDORADO TX
2017-10-26 806-540 0XXX6XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 VEGA TX
2017-10-26 806-563 0XXX1XXX6XXX7XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SUNRAY TX
2017-10-26 806-571 6XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WELLINGTON TX
2017-10-26 914-252 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 OSSINING NY
2017-10-25 214-892 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MCKINNEY TX
2017-10-25 318-593 0–9 XXXall 10 · 6 holders which blocks → NORTHEAST TELEPHONE SERVICES - LA 127J BASTROP LA
2017-10-25 346-280 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CYPRESS TX
2017-10-25 385-293 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E AMERCNFORK UT
2017-10-25 386-221 0–9 XXXall 10 · 8 holders which blocks → ORLANDO TELEPHONE COMPANY DBA SUMMIT BROADBAND 7857 DEBARY FL
2017-10-25 423-466 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 ATHENS TN
2017-10-25 423-501 0–9 XXXall 10 · 4 holders which blocks → SKYBEST COMMUNICATIONS, INC. - TN 081J MOUNTAINCY TN
2017-10-25 438-334 not yet reported which blocks → Bell Mobility 6574 Montreal —
2017-10-25 469-349 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2017-10-25 534-201 1XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CAMERON WI
2017-10-25 534-238 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 DRUMMOND WI
2017-10-25 534-239 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 GRANDVIEW WI
2017-10-25 534-313 3XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 LA POINTE WI
2017-10-25 534-331 1XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 IRON RIVER WI
2017-10-25 534-421 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MARENGO WI
2017-10-25 539-609 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
2017-10-25 581-397 not yet reported which blocks → Bell Mobility 6574 Quebec —
2017-10-25 813-439 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPACEN FL
2017-10-25 947-204 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILFDWH LK MI
2017-10-24 206-702 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-10-24 320-381 0XXX1XXX2XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - MN 184D CLARKFIELD MN
2017-10-24 412-909 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTTSBGZON1 PA

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.