The DART repeaters are owned and maintained by the HPARC.  As part of your HPARC membership you will receive full access to the repeater autopatch and IRLP.

2m VHF Repeater
146.640 MHz (-600 KHz offset, 100 Kz PL)
Location - Oak Park, MI
special feature - autopatch
SKYWARN and ARPSC backup

440 UHF Repeater
443.225MHZ (+MHz offset, 107.2 PL)mber
Location - Beverly Hills, MI
special feature - IRLP Node #4502

HPARC Membership is not required to use the repeater, however all donations are gratefully appreciated. 
Send donations payable to: 
HPARC Inc.
P.O. Box 368
Hazel Park, MI  48030

IRLP Operation and Guidelines Instructions and other important information is available on www.irlp.net

First time users please go to http://www.irlp.net/guidelines.html
Here is a shortened form. 

Operation:

Key up on 443.225 and ID by saying “This is [callsign]”
When frequency is clear, ID and announce accessing link ”This is [callsign] accessing the [link name]”
While keying, punch in the 4 digit repeater code
Allow time for link to connect, then listen for a conversation already in progress.

If clear, announce your call and location — “This is [callsign] calling from [city], [state]”

When finished, ID then clear link by keying “7″ “3″ — “This is [callsign] clearing the link (press 7 3)
When the connection is broken, a computer-generated voice will notify you of the node number with which you have disconnected.

IRLP Guidelines:

Nodes vs. Reflectors-Nodes are individual repeaters like ours; reflectors allow multiple repeaters to connect simultaneously.  You can connect to a node or reflector and not find anyone. Do not connect to a reflector and then have a local QSO! The point of connecting to remote repeaters is to speak with others who are not local.

Always pause 1 or 2 seconds after keying/before speaking, and between transmissions.  There is a slight delay in digitizing and transmitting the repeater audio to the Internet.
 
Be courteous and polite. Allow a large gap when returning, especially on reflectors, as others maybe trying to get in, or checkout.  Be aware of whom you are talking to and what is appropriate discussion, especially with hams in other countries. Ask questions of the other operator and learn about them.

Try:  Reflectors 9250/Las Vegas, 9070/Alaska, 9450/Dallas
        Nodes  3592/Nome, 5600/London, 8200/Tokyo, 1000/Vancouver

For a complete list of IRLP repeater nodes, go to www.irlp.net

(To become a member, please fill out the membership form and mail it in.)