I guess most of us here are currently in the UPC or have been part of the UPC. I don't know how many different OP organizations exist or how large they are but I assume the UPC is the largest. A recent thread talked about the ALJC (Assemblies of the Lord Jesus Christ) and in it I mentioned a couple of organizations that merged to form the ALJC in 1952 and I mentioned some OP organizations over the years that have split off others and some who have merged with others over the years.
I have never been licensed or ordained with the UPC. I was baptized in Elim Tabernacle (UPC) in Milwaukee, WI on October 27, 1955. I was baptized in the Holy Spirit at Bethel Tabernacle (UPC) in Racine Wisconsin on May 20, 1956. I attended the Apostolic Bible Institute (UPC) in St. Paul, MN for the 1956/1957 year. I attended the First Apostolic Church (UPC) in Cincinnati from 1957 until 1963 or 1964 when we left there and started going to an ALJC church. Even though I taught Sunday School at FAC and did some preaching/teaching there and other places for the 6 or 7 years I attended there I was never licensed by the UPC.
Over the years I have been licensed/ordained by the following groups:
Church of Jesus Christ (1959)
Church of Jesus Christ, Pentecostal Faith (early 1960's)
Assemblies of the Lord Jesus Christ (during the 1970's)
Churches of Jesus Christ International (currently ordained)
Hamilton Dream Center (currently ordained)
The old group known as The Church of Jesus Christ which was chartered by Bishop Mark Lawson in 1927 is still active and operating under that charter. Their headquarters are in Kingsport, TN. There are other groups using various names similar to the Church of Jesus Christ operating in different areas such as the one chaired by Bishop James Trull
http://thechurchofjesuschrist-pillowville.com/
and one in Indiana
http://www.thechurchofjesuschrist-ac...m/Churches.htm
and others.
I used to have fellowship with some ministers who belonged to a group called AMA (Apostolic Ministerial Alliance) which was organized in 1941 by L.R. Ooton and others but I don't know if this group still exists or not.
In 1954, Bro. W.E. Kidson and some others left the UPC and formed the IMA
http://interma.net/index.html which is still in operation.
in 1968 some left the UPC and forme the AMF which is also known as the ACI.
In 1992 some left the UPC and formed Global Network
http://interma.net/index.html which still seems to be growing
The PAJC is still active. Some ministers who did not want to merge in 1945 reactivated the PAJC charter. Their HQ is about an hour from where I live. Their web site is
http://www.pajc.org/ I get their magazine in the mail every so often
When the UPC voted to allow tv advertising a few years ago a group left and formed the WWPF (World Wide Pentecostal Fellowship)
Two other OP organizations that I am aware of are
ICOF
http://www.icof.net/index.php/home
and
AWCF
http://awcf.org/component/option,com...ge/Itemid,127/
There may be other OP groups/organizations which are active but this is what I know about right now.