No-NAT ISP Comparison Chart
<2016-08-29 Mon 10:05> Update: Just placed an order with Zen Internet. Order process was over the phone, very straight forward and friendly. A /29 block of IPv4 addresses has been allocated. IPv6 will be enabled. Highly recommended so far... Let's see how it goes :)
I've put together a comparison table of all the ISPs I could find able to offer a routed subnet. This chart includes only FTTC packages without a restriction on speed (i.e. up to 76Mbps).
|IPv4 Subnet||Yes /29 (1)||Yes /29 (2)||Yes /29||Yes /29||Yes /29|
|...How?||Request||Order Form||Request||Request (5)||Default|
|IPv6 Subnet||No||Yes /56||Yes /48||Yes /48||Yes /56|
|Reverse DNS||Unknown||PTR only (3)||PTR only||NS, CNAME, PTR||PTR only|
|Trust Pilot||No Reviews||8.6/10||9.1/10||6.9/10||No Reviews|
Apparently multiple blocks of /29 can be assigned, but there might be a charge for additional blocks. Also, they may not be contiguous to form a full /28.
I asked if a /28 would be available and they said no.
It is not possible to update Reverse DNS from the control panel (apparently). Instead you must contact support and provide a name for each address. Pretty ridiculous.
The website makes numerous claims that they are £0.50/month each, but I have an email saying a /29 subnet is free. Although, this might just be for their home broadband. For the smaller business, you can have more than 8 addresses, but perhaps they then charge 50p per address. So, if I wanted /28 that would be £8/month.
When I contacted them to ask, it seemed more like an exception than a common thing that is done. So maybe not guaranteed.