Odd routing

[#1]

Hi,
Although I am a Plusnet customer, I have an interesting issue with my work BT Internet connections and Plusnet infrastructure.
A tracert www.bbc.co.uk and a tracert bbc.co.uk yield different paths with one of them failing at hop 6. I noticed that within the hops is Plusnet, hence this post.
Is BT Internet using Plusnet infrastructure exclusively now?
I also understand from a friend that although they are BT customers they have had to change MTU setting due to the Plusnet routing.
Any ideas?
Cheers,
Richard

[#2]

Hi Richard,
I've not heard of anything like that before.  Unless it's part of the Broadband Scope platform?
Mind posting a traceroute?

[#3]

Hello James,
Results below:
bbc.co.uk
1    <1 ms    <1 ms    <1 ms  192.168.0.1
2    20 ms    14 ms    16 ms  lo0-plusnet.pte-ag2.plus.net
3    32 ms    14 ms    14 ms  ge0-0-0-504.pte-gw2.plus.net
4    18 ms    21 ms    15 ms  vl23.thn-gw2.plus.net
5   208 ms   224 ms   207 ms  rt0.thdo.bbc.co.uk
6    14 ms    17 ms    16 ms  212.58.238.133
7    15 ms    18 ms    15 ms  rdirslb0.thdo.bbc.co.uk
8    20 ms    16 ms    20 ms  virtual3.rbsov.bbc.co.uk
www.bbc.co.uk
1    <1 ms    <1 ms    <1 ms  192.168.0.1
2    18 ms    16 ms    29 ms  lo0-plusnet.pte-ag2.plus.net
3    15 ms    29 ms    17 ms  ge0-0-0-504.pte-gw2.plus.net
4   103 ms   220 ms   236 ms  vl23.thn-gw2.plus.net
5    15 ms    14 ms    14 ms  rt0.thdo.bbc.co.uk
6    26 ms    18 ms    16 ms  212.58.238.133
7    14 ms    15 ms    15 ms  212.58.239.58
8     *        *        *     Request timed out.

Thanks,
Richard

[#4]

It's the bbc, www.bbc.co.uk doesn't respond to ping but bbc.co.uk does.

[#5]

Richard, are those traceroutes from your BT work connection? If so, James' assumption is very likely to be correct and your work connection is probably being supplied through this.