An hour west of Springfield, IL, the Cass Communications, Inc. cable lineup for the cities of Rushville, Mt. Sterling and Versailles (which is part of the Quincy/Hannibal market) includes 3 NBC affiliates: the home market's WGEM-10 (Quincy), WEEK-25 (Peoria), AND WAND-17 (Decatur--about 100 miles away from Rushville), the latter station added to the Rushville lineup around late 2002 when WAND was still an ABC affiliate [which Quincy lacks other than those areas receiving KTVO from Kirksville, and KHQA-7's (CBS) digital ABC subchannel]. (WHOI-19, the ABC affiliate for Peoria, has always been on Rushville's cable lineup). Interestingly, WICS-20 (Springfield), which swapped affiliations with WAND on Labor Day 2005 and became that market's ABC affiliate, is only offered on digital cable (HD lineup) in Rushville (and IIRC has never been offered on analog to my knowledge even back when channel 20 was an NBC affiliate, despite Springfield Fox affiliate WRSP-55 always having been carried on Rushville's cable).
http://www.casscomm.com/cable/rushville.htmlThe Cass Communications lineup for Cass County and surrounding outlying areas (including the Sangamon County, IL town of Pleasant Plains 17 miles west of Springfield) offers 3 CBS affiliates: WCIA-3 (Champaign), KHQA-7 (Hannibal/Quincy), and WMBD-31 (Peoria). (BTW, Cass County has traditionally been part of the Quincy market, but some maps I have seen do have that county listed as part of Springfield/Decatur/Champaign, particularly with Springfield stations heavily watched in that county).
http://www.casscomm.com/cable/virginia.htmlThe most network affiliates (not counting PBS) I have known to have ever existed on a single cable system has been at least 3 each of ABC, NBC, and CBS around the 1970s on the Macomb, IL cable system (the county seat of McDonough County and home of Western Illinois University), with an explanation as follows:
--From the time of introduction of cable around 1965 in Macomb to the early '90s, their cable traditionally had all of the Peoria "Big 3" affiliates, those from the Quad Cities (WHBF-4 Rock Island, CBS; WOC/KWQC-6 Davenport, NBC; WQAD-8 Moline, ABC), and the Quincy stations (KHQA and WGEM--Macomb is part of the Quincy market).
--When cable first came to Macomb until at least sometime in the '70s, KTVO-3 Kirksville, MO (which was originally CBS primary until becoming ABC by 1970) was originally offered (I don't know if KTVO was reinstated on Macomb's cable during the brief period in 1987-88 when KTVO would have broadcast on their ill-fated 2000-ft. tower and targeted the Quincy market--which would have likely given channel 3 a fair signal at best in the Macomb area).
--I'm not sure if the equally ill-fated WJJY-14 (ABC from Jacksonville, IL from 1969-71 before going dark) ever made it onto Macomb's cable during its short life (for perhaps a 4th ABC at one time).
--I recall also seeing an item hinting that the forementioned WICS-20 in Springfield (back during its NBC days) might have been offered in Macomb at some time (perhaps sometime in the 70s and 80s), possibly resulting in a fourth NBC affiliate offered on that system if that is true).
Now, Macomb's cable (run by Comcast) only offers Quincy network affiliates (CBS, NBC, religious WTJR-16), ABC and Fox from the Quad Cities (WQAD-8 and KLJB-18 Davenport, respectively), and PBS from Iowa Public Television and WMEC-22 (the Macomb translator for the "Network Knowledge" system of three west central Illinois PBS stations based out of Chatham, IL, outside Springfield). Not a single Peoria affiliate has been carried on the system in the last 15 years (not even WAOE-59, the nearest My affiliate to Macomb, which has been relayed to cable systems in parts of western Illinois--leaving Macomb without a My Network TV station on cable).