new area code                                 where affected area codes   format      effective date
0             227                              maryland           240 , 301  overlay                none
1             274                             wisconsin                 920  overlay                none
2             346                                 texas     281 , 713 , 832  overlay       july 1 , 2014
3             364                              kentucky                 270  overlay      march 3 , 2014
4             447                              illinois                 217  overlay                none
5             464                              illinois                 708  overlay                none
6             628                            california                 415  overlay                none
7             629                             tennessee                 615  overlay                none
8             659                               alabama                 205  overlay                none
9             679                              michigan                 313  overlay                none
10            725                                nevada                 702  overlay       june 3 , 2014
11            730                              illinois                 618  overlay                none
12            782  nova scotia and prince edward island                 902  overlay  november 30 , 2014
13            825                               alberta     403 , 587 , 780  overlay      april 9 , 2016
14            844                           toll - free     800888877866855  overlay   december 7 , 2013
15            930                               indiana                 812  overlay    october 6 , 2014
16            959                           connecticut                 860  overlay    august 30 , 2014

Table as JSON:
{"new area code":{"0":227,"1":274,"2":346,"3":364,"4":447,"5":464,"6":628,"7":629,"8":659,"9":679,"10":725,"11":730,"12":782,"13":825,"14":844,"15":930,"16":959},"where":{"0":"maryland","1":"wisconsin","2":"texas","3":"kentucky","4":"illinois","5":"illinois","6":"california","7":"tennessee","8":"alabama","9":"michigan","10":"nevada","11":"illinois","12":"nova scotia and prince edward island","13":"alberta","14":"toll - free","15":"indiana","16":"connecticut"},"affected area codes":{"0":"240 , 301","1":"920","2":"281 , 713 , 832","3":"270","4":"217","5":"708","6":"415","7":"615","8":"205","9":"313","10":"702","11":"618","12":"902","13":"403 , 587 , 780","14":"800888877866855","15":"812","16":"860"},"format":{"0":"overlay","1":"overlay","2":"overlay","3":"overlay","4":"overlay","5":"overlay","6":"overlay","7":"overlay","8":"overlay","9":"overlay","10":"overlay","11":"overlay","12":"overlay","13":"overlay","14":"overlay","15":"overlay","16":"overlay"},"effective date":{"0":"none","1":"none","2":"july 1 , 2014","3":"march 3 , 2014","4":"none","5":"none","6":"none","7":"none","8":"none","9":"none","10":"june 3 , 2014","11":"none","12":"november 30 , 2014","13":"april 9 , 2016","14":"december 7 , 2013","15":"october 6 , 2014","16":"august 30 , 2014"}}