Track GlobalPost US-to-UK international shipments from domestic USPS sorting hubs to Royal Mail and Evri delivery.

Merchants shipping on Stamps.com, ShipStation, Pirate Ship, and EasyPost frequently use GlobalPost Economy and GlobalPost Standard (`GP…US` or USPS domestic label routed to a GlobalPost sorting center in LA, Chicago, NY, or Miami). GlobalPost relabels and consolidates the parcel for air transport to London Heathrow, handing off to Royal Mail or Evri.

Try a live tracking number:

Barcode transition: GlobalPost to Royal Mail

When GlobalPost clears customs and hands off to Royal Mail, lastscanned surfaces the secondary tracking number in the top-level message field.

Origin / middle-mile carrier
GlobalPost (usps)
GlobalPost GP…US / S10 Barcode
^(GP\d{9}US|[A-Z]{2}\d{9}[A-Z]{2})$
Origin example
GP123456789US
Final-mile carrier
Royal Mail (royalmail)
Royal Mail S10 (…GB) / Evri 16-char Barcode
^([A-Z]{2}\d{9}[A-Z]{2}|H[0-9A-Z]{15})$
Final-mile example
LX123456789GB
Extracted in .message
Departed GlobalPost Gateway — Final Mile Carrier: Royal Mail (LX123456789GB)

How the GlobalPost → Royal Mail handoff works

Follow the parcel across both networks without waiting on asynchronous webhooks or losing visibility at the handoff boundary.

1. Domestic leg to GlobalPost US gateway
The merchant drops the package with USPS, which routes it to the nearest GlobalPost regional hub (Los Angeles, Elk Grove Village, Carlstadt, or Miami).
2. GlobalPost processing & international air dispatch
GlobalPost scans the GP…US number, applies the international Royal Mail or Evri barcode, and dispatches air freight to the UK.
3. Royal Mail / Evri UK final delivery
Upon clearing HMRC at Heathrow, Royal Mail or Evri scans the destination barcode and delivers to the UK address.
Royal Mail query
GET /v1/track/LX123456789GB?carrier=royalmail
Evri query
GET /v1/track/H00IAA0012345678?carrier=evri
Domestic-to-export hop
Explains why USPS domestic tracking marks 'Delivered' in Elk Grove Village, IL or Torrance, CA when reaching the GlobalPost export hub

Chain GlobalPost → Royal Mail in code or MCP

Resolve both legs synchronously in TypeScript, curl, or your AI support agent via Streamable HTTP MCP.

REST (Synchronous GET)

# 1. Query GlobalPost origin waybill (extracts final-mile barcode in .message):
curl "https://api.lastscanned.com/v1/track/GP123456789US" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

# 2. Query the extracted Royal Mail barcode:
curl "https://api.lastscanned.com/v1/track/LX123456789GB" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

TypeScript (Automatic Handoff Chaining)

const headers = { Authorization: `Bearer ${process.env.LASTSCANNED_API_KEY}` };
const originRes = await fetch(`https://api.lastscanned.com/v1/track/${encodeURIComponent(number)}`, { headers });
const originPkg = await originRes.json();

// Extract secondary barcode from top-level message ("Departed GlobalPost Gateway — Final Mile Carrier: Royal Mail (LX123456789GB)")
const handoff = originPkg.message?.match(/^Handed to (.+?) as ([A-Z0-9-]+)$/i);
if (handoff) {
  const [, , lastMileNumber] = handoff;
  const destRes = await fetch(`https://api.lastscanned.com/v1/track/${encodeURIComponent(lastMileNumber)}`, { headers });
  const destPkg = await destRes.json();
}

Remote MCP (Claude Code / Cursor / ChatGPT)

claude mcp add --transport http lastscanned https://mcp.lastscanned.com \
  --header "Authorization: Bearer lsk_live_YOUR_API_KEY"

GlobalPost International Economy/Standard to Royal Mail & Evri UK Handoff FAQ

Why does my USPS tracking say Delivered in Elk Grove Village, IL or Torrance, CA when I live in the UK?
GlobalPost (and Pirate Ship Simple Export Rate) uses a domestic USPS label to move your parcel from the seller to GlobalPost's US export warehouse in Illinois, California, New Jersey, or Florida. Once delivered there, GlobalPost flies it to the UK.
How long does GlobalPost Standard take to reach the UK?
GlobalPost Standard typically delivers to UK addresses within 6 to 10 business days after departing the US gateway.

Other carrier handoff guides

Explore cross-border last-mile barcode extraction and domestic USPS consolidator overrides across all 273 carriers.

All 273 supported carriers

International posts and couriers

Cross-border