diff --git a/fast/stages/2-networking-a-peering/data/subnets/dev/dev-dataplatform-ew1.yaml b/fast/stages/2-networking-a-peering/data/subnets/dev/dev-dataplatform-ew1.yaml
index 1e8234bc..ad5a06d5 100644
--- a/fast/stages/2-networking-a-peering/data/subnets/dev/dev-dataplatform-ew1.yaml
+++ b/fast/stages/2-networking-a-peering/data/subnets/dev/dev-dataplatform-ew1.yaml
@@ -2,7 +2,7 @@
 
 region: europe-west1
 description: Default subnet for dev Data Platform
-ip_cidr_range: 100.127.48.0/24
+ip_cidr_range: 10.127.48.0/24
 secondary_ip_ranges:
    pods: 100.64.0.0/24
    services: 100.64.1.0/24
diff --git a/fast/stages/2-networking-a-peering/data/subnets/dev/dev-gke-nodes-ew1.yaml b/fast/stages/2-networking-a-peering/data/subnets/dev/dev-gke-nodes-ew1.yaml
index fad1fbe1..9844d0f0 100644
--- a/fast/stages/2-networking-a-peering/data/subnets/dev/dev-gke-nodes-ew1.yaml
+++ b/fast/stages/2-networking-a-peering/data/subnets/dev/dev-gke-nodes-ew1.yaml
@@ -2,7 +2,7 @@
 
 region: europe-west1
 description: Default subnet for prod gke nodes
-ip_cidr_range: 100.127.49.0/24
+ip_cidr_range: 10.127.49.0/24
 secondary_ip_ranges:
    pods: 100.65.0.0/24
    services: 100.65.1.0/24
diff --git a/fast/stages/2-networking-b-vpn/data/subnets/dev/dev-dataplatform-ew1.yaml b/fast/stages/2-networking-b-vpn/data/subnets/dev/dev-dataplatform-ew1.yaml
index 61dc38a2..ad5a06d5 100644
--- a/fast/stages/2-networking-b-vpn/data/subnets/dev/dev-dataplatform-ew1.yaml
+++ b/fast/stages/2-networking-b-vpn/data/subnets/dev/dev-dataplatform-ew1.yaml
@@ -2,7 +2,7 @@
 
 region: europe-west1
 description: Default subnet for dev Data Platform
-ip_cidr_range: 100.127.48.0/24
+ip_cidr_range: 10.127.48.0/24
 secondary_ip_ranges:
    pods: 100.64.0.0/24
-   services: 100.64.1.0/24
\ No newline at end of file
+   services: 100.64.1.0/24
diff --git a/fast/stages/2-networking-b-vpn/data/subnets/dev/dev-gke-nodes-ew1.yaml b/fast/stages/2-networking-b-vpn/data/subnets/dev/dev-gke-nodes-ew1.yaml
index fad1fbe1..9844d0f0 100644
--- a/fast/stages/2-networking-b-vpn/data/subnets/dev/dev-gke-nodes-ew1.yaml
+++ b/fast/stages/2-networking-b-vpn/data/subnets/dev/dev-gke-nodes-ew1.yaml
@@ -2,7 +2,7 @@
 
 region: europe-west1
 description: Default subnet for prod gke nodes
-ip_cidr_range: 100.127.49.0/24
+ip_cidr_range: 10.127.49.0/24
 secondary_ip_ranges:
    pods: 100.65.0.0/24
    services: 100.65.1.0/24
diff --git a/fast/stages/2-networking-c-nva/data/subnets/dev/dev-dataplatform-ew1.yaml b/fast/stages/2-networking-c-nva/data/subnets/dev/dev-dataplatform-ew1.yaml
index 1e8234bc..ad5a06d5 100644
--- a/fast/stages/2-networking-c-nva/data/subnets/dev/dev-dataplatform-ew1.yaml
+++ b/fast/stages/2-networking-c-nva/data/subnets/dev/dev-dataplatform-ew1.yaml
@@ -2,7 +2,7 @@
 
 region: europe-west1
 description: Default subnet for dev Data Platform
-ip_cidr_range: 100.127.48.0/24
+ip_cidr_range: 10.127.48.0/24
 secondary_ip_ranges:
    pods: 100.64.0.0/24
    services: 100.64.1.0/24
diff --git a/fast/stages/2-networking-d-separate-envs/data/subnets/dev/dev-dataplatform-ew1.yaml b/fast/stages/2-networking-d-separate-envs/data/subnets/dev/dev-dataplatform-ew1.yaml
index 61dc38a2..ad5a06d5 100644
--- a/fast/stages/2-networking-d-separate-envs/data/subnets/dev/dev-dataplatform-ew1.yaml
+++ b/fast/stages/2-networking-d-separate-envs/data/subnets/dev/dev-dataplatform-ew1.yaml
@@ -2,7 +2,7 @@
 
 region: europe-west1
 description: Default subnet for dev Data Platform
-ip_cidr_range: 100.127.48.0/24
+ip_cidr_range: 10.127.48.0/24
 secondary_ip_ranges:
    pods: 100.64.0.0/24
-   services: 100.64.1.0/24
\ No newline at end of file
+   services: 100.64.1.0/24
diff --git a/fast/stages/2-networking-e-nva-bgp/data/subnets/dev/dev-dataplatform-ew1.yaml b/fast/stages/2-networking-e-nva-bgp/data/subnets/dev/dev-dataplatform-ew1.yaml
index d997a459..cdb41e3f 100644
--- a/fast/stages/2-networking-e-nva-bgp/data/subnets/dev/dev-dataplatform-ew1.yaml
+++ b/fast/stages/2-networking-e-nva-bgp/data/subnets/dev/dev-dataplatform-ew1.yaml
@@ -2,7 +2,7 @@
 
 region: europe-west1
 description: Default subnet for dev Data Platform
-ip_cidr_range: 100.127.48.0/24
+ip_cidr_range: 10.127.48.0/24
 secondary_ip_ranges:
    pods: 100.64.0.0/24
    services: 100.64.1.0/24