Track Korean and Singaporean e-commerce parcels shipped via TracX Logis (Qxpress) into USPS Ground Advantage.

South Korean K-beauty, K-pop album, and Singaporean e-commerce exporters use TracX Logis (formerly Qxpress) Economy and Standard air linehaul to ship to the United States. After clearing US customs at LAX or JFK, parcels transfer to USPS Ground Advantage (`920019...` / `926129...`).

Try a live tracking number:

Barcode transition: TracX Logis (Qxpress) to USPS

When TracX Logis (Qxpress) clears customs and hands off to USPS, lastscanned surfaces the secondary tracking number in the top-level message field.

Origin / middle-mile carrier
TracX Logis (Qxpress) (qxpress)
TracX Logis / Qxpress Waybill
QX… / QS…
Origin example
QXUS8392019482
Final-mile carrier
USPS (usps)
USPS IMpb (22 digits)
920019… / 926129…
Final-mile example
9200190175547730049182
Extracted in .message
Arrived at US gateway - Handed over to USPS

How the TracX Logis (Qxpress) → USPS handoff works

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

1. Incheon / Singapore hub processing
TracX Logis receives the parcel at its Incheon or Singapore hub and generates a linked 22-digit USPS Ground Advantage barcode.
2. Trans-Pacific air cargo & US CBP release
Air pallets land at Los Angeles (LAX) or New York (JFK) and clear US CBP Section 321 customs.
3. USPS induction & mailbox delivery
USPS scans the 920019… / 926129… barcode at the regional distribution facility and delivers to the recipient.
TracX Logis query
GET /v1/track/QXUS8392019482?carrier=qxpress
USPS query
GET /v1/track/9200190175547730049182?carrier=usps

Chain TracX Logis (Qxpress) → USPS 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 TracX Logis (Qxpress) origin waybill (extracts final-mile barcode in .message):
curl "https://api.lastscanned.com/v1/track/QXUS8392019482" \
  -H "Authorization: Bearer lsk_live_YOUR_API_KEY"

# 2. Query the extracted USPS barcode:
curl "https://api.lastscanned.com/v1/track/9200190175547730049182" \
  -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 ("Arrived at US gateway - Handed over to USPS")
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"

TracX Logis (Qxpress) to USPS Handoff Tracking FAQ

Who delivers TracX Logis (Qxpress) packages in the United States?
TracX Logis Economy and Standard parcels hand off to USPS Ground Advantage after clearing US customs in Los Angeles or New York.
How long does TracX Logis take from South Korea to the US?
Most shipments deliver within 5 to 10 business days from dispatch in Incheon.

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