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npa-nxxState/ProvinceCompanyFRNRMDOCNRate CenterCLLIAssign DateMisc
406-221MTONVOY, LLC - MT (Sinch)0004323028RMD0001966453FBUTTEHLNAMTMAKMD02/13/2003Prefix Type: CLEC
Switch Name: HELENA
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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406-221 is split into 1,000-number blocks - detail below
406-221-0XXXMTTELNYX LLC (TELNYX LLC)0018998724RMD0001645073HBUTTEMSSLMTMAEMD01/18/2024Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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406-221-1XXXMTONVOY, LLC - MT (Sinch)0004323028RMD0001966453FBUTTEHLNAMTMAKMD11/13/2012Prefix Type: CLEC
Switch Name: HELENA
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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406-221-2XXXMTONVOY, LLC - MT (Sinch)0004323028RMD0001966453FBUTTEHLNAMTMAKMD11/13/2012Prefix Type: CLEC
Switch Name: HELENA
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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406-221-3XXXMTMCIMETRO ACCESS TRANSMISSION SERVICES LLC (Verizon Communications)0004999405RMD00029577229BUTTEHLNAMTMAMMD02/06/2007Prefix Type: CLEC
Switch Name: HELENA
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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406-221-4XXXMTONVOY, LLC - MT (Sinch)0004323028RMD0001966453FBUTTEHLNAMTMAKMD11/13/2012Prefix Type: CLEC
Switch Name: HELENA
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
🔧 Explore Switch(CLLI: HLNAMTMAKMD))
🕘 Prefix History
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406-221-5XXXMTONVOY, LLC - MT (Sinch)0004323028RMD0001966453FBUTTEHLNAMTMAKMD11/13/2012Prefix Type: CLEC
Switch Name: HELENA
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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🕘 Prefix History
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406-221-6XXXMTNEW CINGULAR WIRELESS PCS, LLC (AT&T)0003291192RMD00369096010BUTTEMSSLMTAG5MD10/07/2010Prefix Type: WIRELESS
Switch Name: N/A
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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406-221-7XXXMTCHARTER IP ENABLED SERVICES, LLCN/A792KBUTTENOCLLIKNOWN07/10/2008Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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406-221-8XXXMTTELNYX LLC (TELNYX LLC)0018998724RMD0001645073HBUTTEMSSLMTMAEMD07/14/2020Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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406-221-9XXXMTTDS METROCOM, LLC (Telephone and Data Systems, Inc.)0003767639RMD0003425520KBUTTENOCLLIKNOWN09/24/2025Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: Great Falls MT (648)
Tandem: N/A
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