About EC Firstclass
EC-Firstclass is a prominent mail service. With Parcel Monitor for EC-Firstclass you can track all your packages with real-time updates just your parcel ID!
EC Firstclass Tracking number Instructions:
Some tracking numbers are just digits, e.g. 12 or 15 digits in a row. Some carriers have their specific format for tracking numbers.
Example : CUS200614BLJM1000019