HTTP Status Codes

Code	Description
101	Message being processed by the gateway
102	Message is being rerouted to a different provider after failing via the first provider
151	Message held for screening
200	Message submitted to downstream provider for delivery
202	The request was successful
210	Message accepted by downstream provider
211	Message is enroute for delivery by provider
212	Message submitted. Delivery pending
213	Message scheduled for delivery by downstream provider
220	Message delivered
221	Message delivered to the handset
301	Usage threshold reached. Message discarded
302	Destination address blocked. Message discarded
303	Source address blocked. Message discarded
304	Message dropped. Contact support
305	Message discarded due to duplicate detection
320	Message validity period has expired (prior to submission)
330	Gateway failure
331	Message discarded
332	No available route to destination
333	Source address unsupported for this destination
400	Message failed; undeliverable
401	Destination address blocked. Message discarded
402 and 403	Message skipped by downstream provider
404	Resource not found
405	Message cancelled or deleted by provider
410	Invalid source address
411	Invalid destination address
412	Destination address blocked
413	SMS service unavailable on destination
414	Destination unreachable