anchor.diff:  619,1561,25,607,sl,Sierra Leone,232,Mobitel
   525,1317,12,303,sg,Singapore,65,GRID Communications Pte Ltd
   525,1317,03,63,sg,Singapore,65,MobileOne Ltd
  -525,1317,02,47,sg,Singapore,65,Singtel
   525,1317,01,31,sg,Singapore,65,Singtel
   525,1317,07,127,sg,Singapore,65,Singtel
  +525,1317,02,47,sg,Singapore,65,Singtel
   525,1317,06,111,sg,Singapore,65,Starhub
   525,1317,05,95,sg,Singapore,65,Starhub
   231,561,03,63,sk,Slovakia,421,4Ka
   231,561,06,111,sk,Slovakia,421,O2
  +231,561,01,31,sk,Slovakia,421,Orange
   231,561,05,95,sk,Slovakia,421,Orange
  -231,561,01,31,sk,Slovakia,421,Orange
   231,561,15,351,sk,Slovakia,421,Orange
   231,561,02,47,sk,Slovakia,421,T-Mobile
   231,561,04,79,sk,Slovakia,421,T-Mobile
  
positive.code: 454,1108,14,335,hk,Hongkong China,852,H3G/Hutchinson
  454,1108,05,95,hk,Hongkong China,852,H3G/Hutchinson
  454,1108,04,79,hk,Hongkong China,852,H3G/Hutchinson
  454,1108,29,671,hk,Hongkong China,852,HKT/PCCW
  454,1108,16,367,hk,Hongkong China,852,HKT/PCCW
  454,1108,19,415,hk,Hongkong China,852,HKT/PCCW
  454,1108,20,527,hk,Hongkong China,852,HKT/PCCW
  454,1108,47,1151,hk,Hongkong China,852,shared by private TETRA systems
  454,1108,40,1039,hk,Hongkong China,852,shared by private TETRA systems
  454,1108,08,143,hk,Hongkong China,852,Truephone
  
negative.code: 746,1862,04,79,sr,Suriname,597,UNIQA
  653,1619,10,271,sz,Swaziland,268,Swazi MTN
  653,1619,01,31,sz,Swaziland,268,SwaziTelecom
  240,576,35,863,se,Sweden,46,42 Telecom AB
  240,576,16,367,se,Sweden,46,42 Telecom AB
  240,576,26,623,se,Sweden,46,Beepsend
  240,576,30,783,se,Sweden,46,NextGen Mobile Ltd (CardBoardFish)
  240,576,28,655,se,Sweden,46,CoolTEL Aps
  