I'm not from DC, but have lived in a few large cities in the US and it's pretty much the same in all large markets. There are likely 2-3 big companies that have bundles for home phone, Internet and TV for around $100 a month. Sometimes it can be as low as 50-60 or as high as 200 depending on Internet speed, extra/less TV channels, etc.
Usually the price you pick lasts for a year and then it goes up about 30%. If you don't contract at a discount for a year, i.e. just pay month to month, add maybe 20% to the monthly rate.
RCN, Cox, Comcast, Charter, Verizon seem to all serve DC area. Maybe someone from DC could say which they like better.
Thanks the reply, I'll miss having sky tv but hopefully I won't find cable too bad. I understand I can still get comedy central here. That's interesting about the cost going up after a year, I may only be in my apartment for a year until I buy a place so that's a consideration
That's what I've done in the past - sometimes lived in an apartment on a one year lease, so the one year deal from the cable company worked out.
Most of them also have bundles for 2 of the 3. For example, you can get DirecTV satellite, and then separately get cable internet and digital phone from the big cable/dsl company. Generally, the more services and the longer the term, the lower the price.