Over the last six months an increasing number of countries will not allow internationally originated calls that are presenting a local or national CLI for the country called.
It is believed that the reason behind this is part of a global wide crack down on fraud and nuisance calls, as some of the regulations and requirements introduced may have a more widespread impact on the CLI passed on calls.
Currently, the countries we are aware that are implementing these controls are:-
Australia – ACMA ( Australian Communications & Media Authority ) are actively cracking down on common phone fraud, including malicious “spoofing”.
Australian networks are also trying to stamp out “Wangiri” fraud, where victims are called once from an international number with high premium charges for those who call back.
https://www.acma.gov.au/articles/2019-11/acma-recommends-immediate-action-combat-scams
Canada – CRTC (Canadian Radio-television & Telecommunications Commission ) have issued a requirement for telecoms providers to implement a system to block calls within their network or offer call-filtering service.
https://crtc.gc.ca/eng/phone/telemarketing/identit.htm
China – China have always been very strict on caller ID, as well as not permitting internationally originated calls with a local or national CLI, they do not allow calls presented with a withheld flag.
These calls will either present the withheld CLI or the call will fail.
France – ARCEP ( France’s regulatory body for electronic communications, portal and print media distribution ) have issued a statement to carriers that due to in country regulations, calls sent internationally with a French CLI are not permitted.
Malaysia – we are seeing that calls may fail if a local or national CLI is presented.
Turkey – ICTA ( Information & Communication Technologies Authority ) have introduced CLI regulations which require operators to block some voice calls with CLIs that may be confused with local numbers due to the format of the number presented.
United Arab Emirates – in our experience calls may fail if a local or national CLI is presented. In addition, the UAE are blocking calls with a Tunisian or Algerian CLI.