The Guest Wi-Fi

We signed the lease on Birch Street on a Tuesday in August because the rent was low and the listing said freshly renovated. The agent did not mention the fire. We did not mention it either. March 14, 2019 — the night the nursery went up and the prior owners lost a daughter we never met. We are not them. We are Jenna and Cole, thirty-one and thirty-four, with a cat and no children and a habit of keeping doors closed.

The router came with the unit, a gray box on the hall shelf above the coat hooks. Default SSID was something like ATT-4821. Cole changed it to Birch-5G on move-in day while I unpacked mugs.

At 11:06 p.m. on our third night, my phone asked if I wanted to join a network called 03-14-2019.

I was brushing my teeth. Cole was already in bed reading a paperback he would not finish. The apartment was quiet except for the cat knocking a spoon off the counter.

"Did you rename the Wi-Fi?" I called.

"No. Why?"

I showed him the screen. The date sat in the list like any other SSID, full bars, no lock icon. Guest network, the label said underneath.

Cole sat up. "That's not funny."

"I didn't do it."

We have a rule about not doing spooky things to each other after the year we had. This was not a joke. His face said he knew that.

He logged into the admin page from his laptop. Password still on the sticker under the router — we had meant to change it and had not. The dashboard loaded slow, the way old firmware loads.

Network name: 03-14-2019.

Not Birch-5G. Not anything we set.

Under Connected Devices, one entry: Phone, MAC address ending A4:9F, connected forty-one minutes, signal strong, band 5 GHz, location tag Nursery.

We do not tag locations. The router should not know room names.

"That's not my phone," Cole said. He held up his. Settings, About, Wi-Fi address ending B2:1C.

Mine ended C8:44. The lease in the kitchen drawer lists two occupants. No subletters. No guests this week.

I pulled the admin log. It exports as a plain text file, ugly and useful.

03-14-2019 22:25:11 — Guest network enabled (source: local admin, IP 192.168.1.14) 03-14-2019 22:25:14 — Device A4:9F:12:88:00:03 joined (room: Nursery) 03-14-2019 23:06:02 — SSID broadcast changed (03-14-2019)

192.168.1.14 is the nursery.

We repainted it eggshell because the listing photos showed a home office. We keep the door shut. We store boxes in there. We do not have a device in that room.

Cole unplugged the router. The networks vanished from our phones. He plugged it back in. They returned within ten seconds, same name, same guest, same forty-one minutes of uptime counting upward as if unplugging had been a blink.

I walked down the hall. The nursery door was open two inches. We left it latched this morning; I remember the click because the cat tried to wedge in.

Paint smell hit first — wet latex, sharp, new. The renovation was six months ago. This should not smell new.

The overhead light was off. Streetlight through the blinds made stripes on the empty floor. No phone on the desk. No laptop. No speaker. Just boxes labeled KITCHEN and BOOKS and a folded stroller we bought at a yard sale and never used.

Cole joined me. He checked the closet. He checked behind the door. He got on his knees and looked under the desk.

"Nothing."

The admin page on his phone still showed A4:9F in the nursery.

I searched the MAC prefix online. The vendor field came back blank. Not Apple. Not Samsung. Not a manufacturer with a help line.

At 11:41 the connected time rolled to forty-two minutes. The device had not moved bands. It had not roamed. It sat in the nursery like furniture.

We slept on the couch with the bedroom door shut and the router unplugged again. Morning came with delivery texts and ordinary sun. Cole plugged the router in before coffee. The SSID was Birch-5G again. Guest network gone. Devices tab: our two phones, the cat's automatic feeder, nothing else.

Relief lasted until I opened my email at work.

Attachment from the router's own address — noreply@03-14-2019.local, which should not resolve — subject Admin log export.

The file was longer than what we downloaded. Extra lines at the bottom, timestamped 03:14:2019, the year of the fire, not last night.

03/14/2019 02:17:33 — Device A4:9F:12:88:00:03 joined (room: Nursery) 03/14/2019 02:48:09 — Device A4:9F:12:88:00:03 disconnected (reason: smoke) 03/14/2019 03:01:55 — Network offline

Below that, in the same machine font:

03/14/2026 22:25:11 — Device A4:9F:12:88:00:03 rejoined (room: Nursery) 03/14/2026 23:06:02 — SSID broadcast restored (03-14-2019)

I forwarded it to Cole. He called from the parking lot. "That's the same MAC."

"I know."

"The smoke line is from the fire."

"I know."

We did not tell the landlord. We did not tell the agent. We are not superstitious people; we are people who read logs.

That evening Cole factory-reset the router. New password. New SSID. Birch-5G again, deliberately boring.

At 10:59 p.m. the guest network returned.

03-14-2019.

Connected devices: three.

Cole's phone. Mine. A4:9F in the nursery.

And a fourth line I had not seen before: Jenna-Phone, nursery, MAC matching mine exactly, connected since 22:25.

I looked at my phone in my hand. Settings showed I was on Birch-5G, IP ending .22, not .14.

The nursery door was open again. The paint smell was stronger, like a room freshly rolled and still drying. On the desk, someone had placed a small object we did not own: a burned plastic phone case, pink, melted at one corner, the kind a child drops and a parent replaces.

Cole's voice came from the hall. "Jenna."

"Don't come in yet."

"Why?"

I took a picture of the case. Then I took a picture of the admin page with the impossible MAC and the duplicate of my device in a room I was not standing in.

Proof for later, for someone who believes logs more than ghosts.

The guest network asked for a password. We never set one. The prompt field was labeled Return.

I typed the date we swore we would not say out loud in this house: 03142019.

It accepted.

Signal strength on A4:9F jumped to excellent. A notification appeared on my lock screen, sender Guest:

Thank you for letting me back in. It is cold here. May I use your charger.

The nursery light turned on by itself. Not the overhead — the small lamp we never plugged in, still in its box until tonight, now on the desk, cord running to an outlet that was not live when we toured the unit.

Cole reached the doorway. I showed him the phone case. I showed him the log file with the 2019 smoke disconnect and the 2026 rejoin on the same MAC that no vendor claims.

He did not ask me to delete the guest network. He asked me to close the door.

I closed it. The latch clicked. On both our phones, simultaneously, the Wi-Fi icon switched to 03-14-2019. Connected. Secure.

In the admin log, a new line wrote itself while we watched:

23:14:02 — Device Jenna-Phone relocated (room: Nursery). Occupancy confirmed.

The burned case on the desk was warm to the touch, like something recently held.

We are the only ones home, the lease says. The router disagrees. It has always disagreed. It is counting minutes again — forty-three, forty-four — and the nursery light stays on under the door crack, steady and patient, waiting for us to join the guest list.