Caller ID on your TiVo box is one of over 15 features included FREE with RCN Digital Phone. Simple on screen navigation makes Caller ID a breeze to control. Press the TiVo Central button on your TiVo remote. Choose “Yes” to turn it on, “No” to turn it off.
https://rcn.com/tivo/features/callerid/
Enter TiVo service number. If you are a TiVo customer but your email address is not on file with us, you can add your email address to your TiVo account. Once your email address is on file with us, you can sign in to tivo.com to make changes to your account or schedule recordings on your DVR.
https://www.tivo.com/tivo-mma/alogin/show.do
TiVo Service Number. The TiVo Service Number (or TSN) is the 15 digit code that uniquely identifies easy TiVo DVR. This code is what TiVo uses to attach a service plan to any TiVo DVR. The code is embedded electronically in a chip on the motherboard of each TiVo.
http://www.tivopedia.com/tivo-service-number.php
Caller ID on your TiVo box is one of over 15 features included FREE with RCN Digital Phone. Simple on screen navigation makes Caller ID a breeze to control. Press the TiVo Central button on your TiVo remote. From there, select Settings & Messages > Settings > Displays > Caller ID.
https://rcn.com/tivo/features/callerid/
Step 2: Order a CableCARD™ (cable users only) If you use cable, your TiVo BOLT needs a CableCARD decoder to receive your cable. programming. Pick up a multi-stream CableCARD (M-CARD) at your nearest cable service. center, or order one from your cable company. Don’t wait for your CableCARD to set up your TiVo BOLT.
http://assets.tivo.com/assets/resources/HowTo/BOLT_Guide_Web.pdf
The TiVo service number is a 15-digit number. You can find it: On a sticker on the back of the DVR. On the TV by pressing the TiVo button, and going to 'TiVo Central' > 'Messages & Settings' > 'Account and System Information' > 'System Information'. On a label on the side of the carton.
https://www.tivo.com/tivo-mma/alogin/show.do
service at www.tivo.com/activate or by calling TiVo Customer Support at 1-877-367-8486. If. you purchased your TiVo BOLT from tivo.com, your TiVo BOLT is likely pre-activated and ready. for set up, and you can skip this step. To activate your service, you’ll need your TiVo Service Number (TSN).
http://assets.tivo.com/assets/resources/HowTo/BOLT_Guide_Web.pdf
See who’s calling without having to leave the couch. If you have RCN Digital Phone and TiVo® service from RCN, you can now get Caller ID on your TV. Simply turn on the feature and you’ll see the name and phone number of incoming calls on your main TV.
https://rcn.com/tivo/features/callerid/
Guidelines for finding your TiVo’s model number (or purchasing the proper kit even if you don’t know the model number): 1  TiVo model numbers are located on the back of the TiVo, in a white or silver square area, together with the TiVo service number. If you have an original Philips Series1 standalone receiver (black TiVo without a built-in DirecTV), but do not know the precise model number, then any Philips standalone REPLACE kit will work with your TiVo.
https://www.weaknees.com/find-model.php
Find Your TiVo Model. Guidelines for finding your TiVo’s model number (or purchasing the proper kit even if you don’t know the model number): TiVo model numbers are located on the back of the TiVo, in a white or silver square area, together with the TiVo service number.
https://www.weaknees.com/find-model.php
how to get your tivo service number
A TiVo service number is on a sticker on the back of the digital video recorder., on the TV by pressing the TiVo button, and going to 'TiVo Central' in 'Messages & Settings' in 'Account and System Information' in  'System Information', and on a label on the side of the carton.