Resolving hostname going to internet gateway instead of internal DNS server

We are having apparently random issues with hostname resolution. This will affect random users at random times, then fix itself soon after. What appears to be happening is instead of going to our DNS/WINS server to resolve a computer name, it is going to our gateway to the internet, and getting (always the same) IP address from the internet.

Below is an example using a computer named "edcomm1" (our intranet webpage server), showing the IP it resolves to, the traceroute, and the IP settings for the workstation.

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C:\Documents and Settings\andrew.crouthamel>ipconfig /all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : Edcomm53
        Primary Dns Suffix  . . . . . . . : adc3
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : adc3

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connecti
on
        Physical Address. . . . . . . . . : 00-12-3F-AB-33-FC
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.0.53
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.0.251
        DHCP Server . . . . . . . . . . . : 192.168.0.254
        DNS Servers . . . . . . . . . . . : 192.168.0.254
                                            209.116.241.10
                                            209.92.1.12
                                            206.205.242.132
                                            206.245.170.12
        Primary WINS Server . . . . . . . : 192.168.0.254
        Lease Obtained. . . . . . . . . . : Monday, August 20, 2007 3:09:19 AM
        Lease Expires . . . . . . . . . . : Monday, August 27, 2007 3:09:19 AM

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C:\Documents and Settings\andrew.crouthamel>ping edcomm1

Pinging edcomm1.adc3 [64.158.56.46] with 32 bytes of data:

Request timed out.

Ping statistics for 64.158.56.46:
    Packets: Sent = 1, Received = 0, Lost = 1 (100% loss),
Control-C
^C

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C:\Documents and Settings\andrew.crouthamel>tracert edcomm1

Tracing route to edcomm1.adc3 [64.158.56.46]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  192.168.0.251
  2     *        1 ms     1 ms  207.8.173.97
  3    73 ms    20 ms     5 ms  netnews1-l-netaxs.net [207.106.2.25]
  4     5 ms    10 ms    16 ms  ge-1-0-311.core01.cnshpaat.fast.net [169.130.98.82]
  5     6 ms     6 ms     6 ms  ge-1-1-0-228.core1.phlapafg.uslec.net [169.130.98.17]
  6     6 ms     6 ms     6 ms  ge-6-21.car2.Philadelphia1.Level3.net [4.78.164.9]
  7    15 ms     6 ms    17 ms  ae-11-11.car1.Philadelphia1.Level3.net [4.69.133.165]
  8    24 ms    26 ms    18 ms  ae-7-7.ebr2.Washington1.Level3.net [4.69.133.162]
  9    27 ms    25 ms    28 ms  ae-82-82.csw3.Washington1.Level3.net [4.69.134.154]
 10    16 ms    16 ms    30 ms  ae-31-89.car1.Washington1.Level3.net [4.68.17.131]
 11    28 ms    54 ms    20 ms  unknown.Level3.net [63.210.59.250]
 12     *        *        *     Request timed out.Start Free Trial