NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

11 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 573
INTRADO COMMUNICATIONS, LLC 4
ONVOY, LLC - MO 2
BANDWIDTH.COM CLEC, LLC - MO 2
EXIANT COMMUNICATIONS LLC 1
E. RITTER COMMUNICATIONS, LLC 1
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2017-10-26 573-488-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ASHLAND MO
2017-10-19 573-550-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FULTON MO
2017-10-17 573-702-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLOOMSDALE MO
2017-10-17 573-702-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLOOMSDALE MO
2017-10-13 573-500-5XXX 5000–5999Assigned ONVOY, LLC - MO 093F CAMPBELL MO
2017-10-13 573-600-6XXX 6000–6999Assigned ONVOY, LLC - MO 093F HANNIBAL MO
2017-10-11 573-491-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 NEWBLOMFLD MO
2017-10-05 573-436-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 POTOSI MO
2017-09-27 573-533-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTERTOWN MO
2017-09-18 573-856-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E PATTERSON MO
2017-09-18 573-890-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 FULTON MO
2017-09-15 573-430-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLAT RIVER MO
2017-09-15 573-430-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLAT RIVER MO
2017-09-15 573-430-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FLAT RIVER MO
2017-08-30 573-232-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST ROBERT MO
2017-08-29 573-773-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E PALMYRA MO
2017-08-29 573-859-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E BELLE MO
2017-08-11 573-607-9XXX 9000–9999Assigned MCC TELEPHONY LLC 593K COLUMBIA MO
2017-08-10 573-361-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ESSEX MO
2017-08-10 573-371-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 HOLCOMB MO
2017-08-10 573-394-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 RISCO MO
2017-08-10 573-448-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 GIDEON MO
2017-08-03 573-836-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CAMDENTON MO
2017-07-12 573-410-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CAMDENTON MO
2017-07-07 573-351-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E DONIPHAN MO
2017-07-07 573-354-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E OXLY MO
2017-07-07 573-534-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 BONNETERRE MO
2017-07-07 573-857-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E FAIRDEALNG MO
2017-07-05 573-524-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MACKSCREEK MO
2017-06-29 573-282-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARBLEHILL MO
2017-06-29 573-643-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E MARSTON MO
2017-06-27 573-502-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 GRAVOIS ML MO
2017-06-26 573-965-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VERSAILLES MO
2017-06-26 573-965-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VERSAILLES MO
2017-06-20 573-432-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E IRONTON MO
2017-06-07 573-598-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ANNAPOLIS MO
2017-06-06 573-282-1XXX 1000–1999Assigned TELNYX LLC 073H MARBLEHILL MO
2017-06-06 573-414-0XXX 0000–0999Assigned TELNYX LLC 073H DEXTER MO
2017-06-06 573-416-1XXX 1000–1999Assigned TELNYX LLC 073H FULTON MO
2017-06-06 573-577-0XXX 0000–0999Assigned TELNYX LLC 073H HANNIBAL MO
2017-06-06 573-591-9XXX 9000–9999Assigned TELNYX LLC 073H MEXICO MO
2017-06-06 573-838-2XXX 2000–2999Assigned TELNYX LLC 073H SIKESTON MO
2017-06-06 573-901-8XXX 8000–8999Assigned TELNYX LLC 073H MALDEN MO
2017-06-01 573-440-8XXX 8000–8999Assigned TELNYX LLC 073H FREDERCKTN MO
2017-06-01 573-454-8XXX 8000–8999Assigned TELNYX LLC 073H FLAT RIVER MO
2017-06-01 573-504-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 PUXICO MO
2017-06-01 573-551-8XXX 8000–8999Assigned TELNYX LLC 073H KENNETT MO
2017-06-01 573-605-8XXX 8000–8999Assigned TELNYX LLC 073H PERRYVILLE MO
2017-06-01 573-984-8XXX 8000–8999Assigned TELNYX LLC 073H STEGNVIEVE MO
2017-05-31 573-284-0XXX 0000–0999Assigned TELNYX LLC 073H VERSAILLES MO

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.