Local Calling Guide
Area code/prefix search
  
        Monticello, UT
      
  
    
      | NPA-NXX | 
      BLOCK | 
        Switch | 
        OCN | 
        LATA | 
        LIR | 
        Eff date | 
      Disc date | 
    
  
  
          
          | 435-298
           | A | 
      	      MNTIUT140MD  | 
		      832J E. FIBER SAN JUAN, LLC | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-298
           | 8 | 
      	      MNTIUT140MD  | 
		      832J E. FIBER SAN JUAN, LLC | 
		      660 | 
		        | 
	          2022-01-15  | 
           
       | 
      
        
          | 435-419
           | A | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-419
           | 0 | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-419
           | 1 | 
      	      WVCYUT14DS1  | 
		      871E ONVOY, LLC - UT | 
		      660 | 
		        | 
	          2020-12-20  | 
           
       | 
      
        
          | 435-419
           | 2 | 
      	      WVCYUT14DS1  | 
		      871E ONVOY, LLC - UT | 
		      660 | 
		        | 
	          2019-05-21  | 
           
       | 
      
        
          | 435-419
           | 3 | 
      	      WVCYUT14DS1  | 
		      871E ONVOY, LLC - UT | 
		      660 | 
		        | 
	          2019-05-21  | 
           
       | 
      
        
          | 435-419
           | 4 | 
      	      WVCYUT14DS1  | 
		      871E ONVOY, LLC - UT | 
		      660 | 
		        | 
	          2018-11-12  | 
           
       | 
      
        
          | 435-419
           | 5 | 
      	      WVCYUT14DS1  | 
		      871E ONVOY, LLC - UT | 
		      660 | 
		        | 
	          2020-08-08  | 
           
       | 
      
        
          | 435-419
           | 6 | 
      	      TOOLUTMAAMD  | 
		      7530 TELEPORT COMMUNICATIONS AMERICA, LLC - UT | 
		      660 | 
		        | 
	          2020-11-17  | 
           
       | 
      
        
          | 435-419
           | 7 | 
      	      WVCYUT14DS1  | 
		      871E ONVOY, LLC - UT | 
		      660 | 
		        | 
	          2020-12-20  | 
           
       | 
      
        
          | 435-419
           | 8 | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	          2025-10-05  | 
           
       | 
      
        
          | 435-419
           | 9 | 
      	      SLKEUT45DS0  | 
		      5727 FIRSTDIGITAL TELECOM, LLC - UT | 
		      660 | 
		        | 
	          2017-12-20  | 
           
       | 
      
        
          | 435-459
           | A | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-459
           | 0 | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-459
           | 1 | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-459
           | 2 | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-459
           | 3 | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-459
           | 4 | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-459
           | 7 | 
      	        | 
		      145J TERRA NOVA TELECOM INC. | 
		      660 | 
		        | 
	          2025-07-10  | 
           
       | 
      
        
          | 435-459
           | 8 | 
      	      WVCYUT145MD  | 
		      073H TELNYX LLC | 
		      660 | 
		        | 
	          2021-02-11  | 
           
       | 
      
        
          | 435-459
           | 9 | 
      	      SLKDUTBTAMD  | 
		      6571 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
        
          | 435-587
           | A | 
      	      MNTIUTXCDS0  | 
		      4429 CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT | 
		      660 | 
		        | 
	            | 
           
       | 
      
  
  
   Last updated: Thu, 16 Oct 2025 03:04:18 UTC
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