Front Street was quite a short street on the basis of the maps I have looked at, it seems it ran only from the railway level crossing northwards to Mill Lane. Pre 1900 maps show the village as very small, but the village began to grow about 1900. By 1914 additional streets such as Lee Street, Jackson Street and Jubilee Terrace had been built along with a Miner's Home to the north of those streets.
The old village is long since gone, and 'new' houses have been built on the sites of the disappeared streets, however it is possible to say that Front Street as was is still the B1505 and modern maps name it as Front Street. The Seaton Burn helps locate the southern limit of Annitsford as was, and Mill Lane is extant. Front Street runs nothward between those two points. Sadly nothing is left besides the original road.
This maps helps a lot and is zoomable.
https://maps.nls.uk/view/101028834The street names Lee Street and Jubilee Court survive but they are not where the original streets lay.
I hope that helps.
P