Can 893 area code be from a calling card?

Answer 1

There are no international telephone numbers beginning with +89 because that range is used for telephone calling cards. However, +89 or +893 should not show up on Caller ID or other services, because the numbers are not dialable.

There is no area code +1 893 in North America (USA, Canada, etc.).

(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)