A

Abitibi Consolidated (Telephone Exchange System) (A3)

Amtelecom Inc. (A2)

B

BC TEL (B1)

Bell Canada (B2)

Brooke Telecom (B6)

Bruce Municipal Telephone System (B7)

C

Call-Net Communications Inc. (CNCI) (C43)

Canadian Alliance of Publicly-Owned Telecommunications System (CAPTS) (C30)

Cochrane Public Utilities Commission (C1)

D

Dryden Municipal Telephone System (D3)

Durham Telephone Limited (D2) (see Nexicom Telecommunications Inc. (N24))

G

Gosfield North MTS (G2)

Téléphone Guèvremont Inc. (G1)

GT Group Telecom Services Corporation (G7)

H

Halifax Cablevision Limited (H9)

Hay Communications Co-operative Limited (H3)

Huron Telecommunications Co-Operative Limited (H4)

I

Island Telecom Inc. (J1)

K

Kenora Municipal Telephone System (K1)

L

Lansdowne Rural Telephone Co. Ltd. (L3)

La Corporation de Téléphone de La Baie (1993) (L1)

M

Maritime Tel & Tel Limited (MTT) (M1)

Maskatel inc. (M22)

MetroNet Communications Group Inc. (M15)

Mornington Communications Co-Operative Limited (M5)

MTS Communications Inc. (M3) 

N

The New Brunswick Telephone Company, Limited (NBTel) (N5) 

NewTel Communications Inc. (N2)

North Renfrew Telephone Company Limited (N10)

Northern Telephone Limited (N3) 

Novus Telecom Inc. (N20)

O

Ontario Northland Telecommunications (O.N. Tel) (O4)

Ontario Telephone Association (OTA) (O2)

Otonabee Telephones Limited (O3)

P

People's Telephone Company of Forest Ltd (P1)

Prince Rupert City Telephones (P2)

Q

Quadro Communications Co-Operative Inc. (Q2)

Québec-Téléphone (Q1)

R

Rogers Cablesystems Inc. (R4)

S

Seaside Cable (S25)

Shaw Cable (S9)

Sogetel Inc. (S4)

South Bruce (S8)

Stentor Resource Centre Inc. (S1)

Le Téléphone de St-Éphrem Inc. (S6)

La Compagnie de Téléphone de St-Victor (S7)

T

Télébec ltée (T5)

Teleglobe Canada Inc. (T2)

Telesat Canada (T3)

TELUS Communications Inc. (TCI) (T10)

TELUS Communications (Edmondton) Inc. (TCEI) (T11) - Formerly known as BC TEL

The Corporation of the City of Thunder Bay - Telephone Division (Thunder Bay Telephone) (T8)

Tuckersmith Communications Co-operative Limited (T7)

U

La Compagnie de Téléphone Upton Inc. (U2)

V

CoopTel (formerly known as la Co-op de téléphone de Valcourt) (V1)

Vidéotron Cable Systems Inc. (V6)

Vidéotron Communications Limited (V4)

Vidéotron ltée (V3)

Vidéotron Télécom Limitée (V2)

W

Westman Media Cooperative Ltd. (W11)

Westport Telephone Company Limited (W3)

Wightman Telephone Limited (W4)