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Direct-dial Calls
Operator-assisted Calls
Operator
Directory Assistance
Resources

Direct-dial Calls*

To call...	Press...
Within MIT, including residences -- All Classes of Service	Five-digit MIT extension
MIT-affiliated institutions -- all Classes of Service	Use Direct-dial Tie Lines
Local calls -- 617, 857, 781, 339, 508, 774, 978, 351 area codes (Classes A, B1, B2)	9 + 1 + area code + phone number
Long distance from Class A Telephone	9 + 1 + area code + phone number
Long distance from Class B1 Telephone	191 + MIT account number + 1 + area code + phone number
Long distance from Class B2, C, F Telephones	Calling card required
International, from Class A Telephone	9 + 011 + country code + city code + phone number
International, from Class B1 Telephone	192 + MIT account number + 011 + country code + city code + phone number
Toll-free (800/888/877) numbers ( All Classes)	9 + 1 + 8xx + phone number

Note: ALL CALLS require the area code.
Long Distance: Includes US and its territories, and Canada.
Calling card: May be used on all toll calls. See the card for toll-free access numbers and other instructions.

Operator-assisted Calls*

Collect, credit card, person-to-person, third-party billing:

To call...	Press...
Long distance	190 + 0 + area code + phone number
International	190 + 01 + country code + city code + phone number

Note: Long Distance: Includes US and its territories, and Canada.
Calling card: May be used on all toll calls. See the card for toll-free access numbers and other instructions.

Operator

To call...	Press...
MIT (8 am to 5 PM, M-F, except holidays)	0 (Oper)
Verizon	190 + 0
AT&T and International	190 + 00

Directory Assistance

To call...	Press...
MIT (8 am to 5 PM, M-F, except holidays)	0 (Oper)
NameConnector Service	2-4111
Area codes 617/857, 781/339, 508/774, 978/351 from Classes A, B1, B2	9 + 411
Long distance from Class A	9 + 1 + area code + 555-1212
Long distance from Class B1	191 + MIT account number + 1 + area code + 555-1212
Long distance from Classes B2, C, F	Calling card required
International from Classes A, B1, B2	190 + 00 (this is a toll call and will require a calling card)

*Note: Calls to non-MIT directory assistance incur a charge.

Resources

• Telephone Repair Help Desk
• MIT Telephone Number Information
• MIT Telephone Features
• Student Dialing Instructions
• Telephone Classes of Service
• Calling Rates for MIT Business Telephones

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